diff --git a/build.xml b/build.xml
deleted file mode 100644
index 1135d638b..000000000
--- a/build.xml
+++ /dev/null
@@ -1,605 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<!--+
-    |
-    |  OpenRefine Build File
-    |
-    +-->
-    
-<project name="openrefine" default="build" basedir="." xmlns:jacoco="antlib:org.jacoco.ant">
-
-    <!-- Properties are immutable, so anything set in this file takes priority-->
-    <property file="build.properties"/>
-    
-    <property environment="env"/>
-
-    <property name="version" value="trunk"/>
-    <property name="full_version" value="0.0.0.0"/>
-    <property name="build.dir" value="build"/>
-    <property name="dist.dir" value="dist"/>
-
-    <property name="java_version" value="1.8"/>
-
-    <property name="appengine.app_id" value="openrefine-broker"/>
-    <property name="appengine.version" value="1"/>
-    <property name="appengine.sdk.dir" value="/opt/appengine"/>
-        
-    <property name="fullname" value="openrefine-${version}" />
-    
-    <property name="main.dir" value="${basedir}/main" />
-
-    <property name="webapp.dir" value="${main.dir}/webapp" />
-    <property name="webapp.src.dir" value="${main.dir}/src" />
-    <property name="webapp.lib.dir" value="${webapp.dir}/WEB-INF/lib" />
-    <property name="webapp.classes.dir" value="${webapp.dir}/WEB-INF/classes" />
-
-    <property name="server.dir" value="${basedir}/server" />
-    <property name="server.src.dir" value="${server.dir}/src" />
-    <property name="server.lib.dir" value="${server.dir}/lib" />
-    <property name="server.classes.dir" value="${server.dir}/classes" />
-
-    <property name="broker.dir" value="${basedir}/broker" />
-    <property name="broker.core.dir" value="${broker.dir}/core" />
-    <property name="broker.appengine.dir" value="${broker.dir}/appengine" />
-
-    <property name="extensions.dir" value="${basedir}/extensions" />
-    
-    <property name="tests.dir" value="${main.dir}/tests" />
-    <property name="server.tests.dir" value="${tests.dir}/server" />
-    <property name="server.tests.lib.dir" value="${server.tests.dir}/lib" />
-    <property name="server.tests.src.dir" value="${server.tests.dir}/src" />
-    <property name="server.tests.classes.dir" value="${server.tests.dir}/classes" />
-    <property name="server.tests.report.dir" value="${build.dir}/report"/>
-    <property name="server.tests.report.html.dir" value="${server.tests.report.dir}/html"/>
-    <property name="server.tests.report.xml.path" value="${server.tests.report.dir}/jacoco.xml"/>
-    
-    <property name="graphics.dir" value="${basedir}/graphics" />
-    <property name="conf.dir" value="${basedir}/conf" />
-    <property name="tools.dir" value="${basedir}/tools" />
-    
-    <property name="reports.dir" value="${build.dir}/reports" />
-
-    <property name="built.webapp.name" value="webapp" />
-    <property name="built.webapp.dir" value="${build.dir}/${built.webapp.name}" />
-
-    <property name="built.broker.webapp.dir" value="${build.dir}/broker" />
-
-    <property name="mac.dir" value="${build.dir}/mac" />
-    <property name="release.name" value="openrefine-${version}" />
-    <property name="windows.dir" value="${build.dir}/windows/${release.name}" />
-    <property name="linux.dir" value="${build.dir}/linux/${release.name}" />
-    
-    <!-- ================================================================== -->
-    
-    <path id="server.class.path">
-        <fileset dir="${server.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <pathelement location="${server.classes.dir}"/>
-    </path>
-
-    <path id="webapp.class.path">
-        <fileset dir="${server.lib.dir}">
-            <include name="**/servlet-api*.jar" />
-        </fileset>
-        <fileset dir="${webapp.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <pathelement location="${webapp.classes.dir}"/>
-    </path>
-
-    <path id="tests.class.path">
-        <path refid="webapp.class.path"/>
-        <path refid="server.class.path"/>
-    	<pathelement location="${server.tests.classes.dir}"/>
-        <pathelement location="${server.tests.lib.dir}/testng-6.8.jar"/>
-    	<pathelement location="${tests.dir}/data" />
-        <fileset dir="${server.tests.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-    </path>
-
-    <path id="broker.class.path">
-        <fileset dir="${server.lib.dir}">
-            <include name="**/servlet-api*.jar" />
-        </fileset>
-        <fileset dir="${webapp.lib.dir}">
-            <include name="**/butterfly*.jar" />
-            <include name="**/json*.jar" />
-            <include name="**/http*.jar" />
-            <include name="**/slf4j-api*.jar" />
-        </fileset>
-        <fileset dir="${broker.core.dir}/module/MOD-INF/lib">
-            <include name="**/*.jar" />
-        </fileset>
-    </path>
-
-    <path id="broker.appengine.class.path">
-        <pathelement location="${broker.core.dir}/module/MOD-INF/classes"/>
-        <path refid="broker.class.path"/>
-        <fileset dir="${appengine.sdk.dir}/lib">
-            <include name="shared/**/*.jar" />
-            <include name="user/**/*.jar" />
-        </fileset>
-    </path>
-
-    <!-- ================================================================== -->
-
-    <target name="build_server">
-        <mkdir dir="${server.classes.dir}" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" srcdir="${server.src.dir}" destdir="${server.classes.dir}" debug="true" includeAntRuntime="no">
-            <classpath refid="server.class.path" />
-        </javac>
-        <copy file="${server.src.dir}/log4j.properties" tofile="${server.classes.dir}/log4j.properties"/>
-    </target>
-            
-    <target name="build_webapp">
-        <mkdir dir="${webapp.classes.dir}" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${webapp.classes.dir}" debug="true" includeAntRuntime="no">
-            <src path="${webapp.src.dir}"/>
-            <classpath refid="webapp.class.path" />
-        </javac>
-        <copy file="${webapp.src.dir}/log4j.properties" tofile="${webapp.classes.dir}/log4j.properties"/>
-        <copy file="${main.dir}/resources/schemas/datapackage-template.json" tofile="${webapp.classes.dir}/schemas/datapackage-template.json"/>
-        <copy file="${main.dir}/resources/schemas/TableSchemaValidator.json" tofile="${webapp.classes.dir}/schemas/TableSchemaValidator.json"/>
-        <copy file="${webapp.src.dir}/validator-resource-bundle.properties" tofile="${webapp.classes.dir}/validator-resource-bundle.properties"/>
-        <copy file="${webapp.src.dir}/log4j.properties" tofile="${webapp.classes.dir}/log4j.properties"/>
-    </target>
-
-    <target name="build_tests" depends="build">
-        <mkdir dir="${server.tests.classes.dir}" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" srcdir="${server.tests.src.dir}" destdir="${server.tests.classes.dir}" debug="true" includeAntRuntime="no">
-            <classpath refid="tests.class.path" />
-        </javac>
-        <copy file="${server.tests.src.dir}/tests.log4j.properties" tofile="${server.tests.classes.dir}/tests.log4j.properties"/>
-    </target>
-    
-    <target name="build_extensions">
-      <ant dir="extensions/" target="build" />
-    </target>
-
-    <target name="build" depends="build_server, build_webapp, build_extensions"/>
-
-    <target name="build_broker_core">
-        <mkdir dir="${broker.core.dir}/module/MOD-INF/classes" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${broker.core.dir}/module/MOD-INF/classes" debug="true" includeAntRuntime="no">
-            <src path="${broker.core.dir}/src/"/>
-            <classpath refid="broker.class.path" />
-        </javac>
-    </target>
-
-    <target name="build_broker_appengine" depends="build_broker_core">
-        <mkdir dir="${broker.appengine.dir}/module/MOD-INF/classes" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${broker.appengine.dir}/module/MOD-INF/classes" debug="true" includeAntRuntime="no">
-            <src path="${broker.appengine.dir}/src/"/>
-            <classpath refid="broker.appengine.class.path" />
-        </javac>
-    </target>
-
-    <target name="build_broker" depends="build_broker_core, build_broker_appengine"/>
-
-    <taskdef resource="testngtasks" classpath="${server.tests.lib.dir}/testng-6.8.jar"/>
-    <taskdef uri="antlib:org.jacoco.ant" resource="org/jacoco/ant/antlib.xml">
-        <classpath path="${server.tests.lib.dir}/jacocoant.jar"/>
-    </taskdef>
-
-    <mkdir dir="${build.dir}/server_tests"/>
-    <target name="server_test" depends="build_tests">
-	<jacoco:coverage destfile="${server.tests.report.dir}/jacoco.exec">
-            <testng verbose="2" haltOnFailure="true" workingdir="${build.dir}/server_tests"
-                listener="org.testng.reporters.DotTestListener" excludedgroups="broken"
-                classpathref="tests.class.path">
-             <xmlfileset file="${server.tests.dir}/conf/tests.xml"/>
-            </testng>
-	</jacoco:coverage>
-        <jacoco:report>
-           <executiondata>
-		   <file file="${server.tests.report.dir}/jacoco.exec"/>
-           </executiondata>
-
-           <structure name="OpenRefine server">
-               <classfiles>
-		       <fileset dir="${webapp.classes.dir}"/>
-               </classfiles>
-                <sourcefiles encoding="UTF-8">
-	            <fileset dir="${server.src.dir}"/>
-                </sourcefiles>
-            </structure>
-	    <html destdir="${server.tests.report.html.dir}"/>
-	    <xml destfile="${server.tests.report.xml.path}"/>
-        </jacoco:report>
-    </target>
-
-    <!-- runs the tests for the extensions -->
-    <target name="extensions_test" depends="build">
-      <ant dir="extensions/" target="test" />
-    </target>
-
-    <!-- ================================================================== -->
-
-    <target name="prepare_jar">
-        <mkdir dir="${build.dir}"/>
-    </target>
-
-    <target name="jar_server" depends="prepare_jar, build_server">
-        <jar destfile="${build.dir}/${fullname}-server.jar" basedir="${server.classes.dir}"/>
-    </target>
-    
-    <target name="jar_webapp" depends="prepare_jar, build_webapp">
-        <jar destfile="${build.dir}/${fullname}.jar" basedir="${webapp.classes.dir}"/>
-    </target>
-
-    <target name="jar" depends="jar_server, jar_webapp"/>
-
-    <!-- ================================================================== -->
-
-    <target name="prepare_webapp" depends="jar_webapp, build">
-        <mkdir dir="${built.webapp.dir}" />
-        
-        <copy todir="${built.webapp.dir}">
-            <fileset dir="${webapp.dir}">
-                <include name="**/*"/>
-                <exclude name="WEB-INF/classes/**"/>
-                <exclude name="WEB-INF/lib-src/**"/>
-                <exclude name="WEB-INF/lib/icu4j*.jar"/>
-            </fileset>
-        </copy>
-        
-        <copy file="${build.dir}/${fullname}.jar" tofile="${built.webapp.dir}/WEB-INF/lib/${fullname}.jar"/>
-
-        <copy todir="${built.webapp.dir}/extensions">
-            <fileset dir="${extensions.dir}">
-                <include name="**/*"/>
-                <exclude name="**/build.xml"/>
-                <exclude name="**/src/**"/>
-                <exclude name="**/lib-src/**"/>
-                <exclude name="**/libsrc/**"/>
-            </fileset>
-        </copy>
-        
-        <replace file="${built.webapp.dir}/WEB-INF/web.xml">
-            <replacefilter token="$VERSION" value="${version}"/>
-        </replace>
-
-        <replace file="${built.webapp.dir}/WEB-INF/butterfly.properties">
-            <replacefilter token="../../extensions" value="extensions"/>
-        </replace>
-
-    </target>
-    
-    <target name="mac" depends="jar, prepare_webapp">
-        <mkdir dir="${mac.dir}"/>
-        
-	<taskdef name="bundleapp"
-             classname="com.oracle.appbundler.AppBundlerTask"   
-             classpath="${appbundler.dir}/appbundler-1.0.jar" />
-
-        <bundleapp outputdirectory="${mac.dir}"
-            name="OpenRefine"
-            displayname="OpenRefine ${version}"
-            icon="${graphics.dir}/icon/openrefine.icns"
-            identifier="com.google.refine.Refine"
-	    shortversion="${version}"
-            mainclassname="com/google/refine/Refine">
-	    <runtime dir="${env.JAVA_HOME}"/>
-            <classpath dir="${build.dir}">
-	      <include name="${fullname}-server.jar" />
-	    </classpath>
-            <classpath dir="${server.lib.dir}">
-	      <include name="**/*.jar" />
-	    </classpath>
-	    <option value="-Xms256M"/>
-	    <option value="-Xmx1024M"/>
-	    <option value="-Drefine.version=${version}"/>
-	    <option value="-Drefine.webapp=$APP_ROOT/Contents/Resource/${built.webapp.name}"/>
-        </bundleapp>
-
-	<copy todir="${mac.dir}/OpenRefine.app/Contents/Resource">
-          <fileset dir="${build.dir}" id="librarypathset" >
-            <include name="${built.webapp.name}/**/**" />
-          </fileset>
-	</copy>
-
-<!--- Options from old jarbundler code not supported by appbundler
-                aboutmenuname="OpenRefine"
-                workingdirectory="$APP_PACKAGE/Contents/Resources"
-                antialiasedgraphics="true"
-                antialiasedtext="true"
-                liveresize="true"
-                growboxintrudes="true"
-                screenmenu="true">
--->
-    </target>
-    
-    <target name="windows" depends="jar, prepare_webapp">
-      <echo message="Full version ${full_version} and version ${version}"/>
-        <mkdir dir="${windows.dir}"/>
-        <taskdef 
-            name="launch4j" 
-            classname="net.sf.launch4j.ant.Launch4jTask" 
-            classpath="${launch4j.dir}/launch4j.jar:${launch4j.dir}/lib/xstream.jar" 
-        />
-        <launch4j>
-          <config 
-               headerType="console" 
-               outfile="${windows.dir}/openrefine.exe" 
-               jarPath="server/lib/${fullname}-server.jar" 
-               dontWrapJar="true"
-               icon="${graphics.dir}/icon/openrefine.ico">
-            <classPath mainClass="com.google.refine.Refine">
-                <cp>server/lib/*.jar</cp>
-            </classPath>
-            <jre minVersion="1.8.0" jdkPreference="preferJre" initialHeapSize="256" maxHeapSize="1024">
-                <opt>-Djava.library.path=server/lib/native/windows </opt>
-            </jre>
-            <versionInfo
-                fileVersion="${full_version}"
-                txtFileVersion="${version}"
-                fileDescription="openrefine"
-                copyright="Copyright (c) 2013 OpenRefine contributors, 2010, Google, Inc."
-                productVersion="${full_version}"
-                txtProductVersion="${version}"
-                productName="OpenRefine"
-                companyName="OpenRefine team"
-                internalName="openrefine"
-                originalFilename="openrefine.exe" 
-            />
-          </config>
-        </launch4j>     
-        <copy file="${build.dir}/${fullname}-server.jar" tofile="${windows.dir}/server/lib/${fullname}-server.jar"/>
-        <copy todir="${windows.dir}/server/lib">
-            <fileset dir="${server.lib.dir}">
-                <include name="**/*.jar"/>
-            </fileset>
-        </copy>
-        <copy todir="${windows.dir}/server/lib/native/windows">
-            <fileset dir="${server.lib.dir}/native/windows">
-                <include name="*.dll"/>
-            </fileset>
-        </copy>
-
-        <copy todir="${windows.dir}/webapp">
-            <fileset dir="${built.webapp.dir}">
-                <include name="**"/>
-            </fileset>
-        </copy>
-
-        <mkdir dir="${windows.dir}/licenses"/>
-        <fixcrlf srcDir="${basedir}/licenses" destDir="${windows.dir}/licenses" eol="crlf"/>
-
-        <fixcrlf srcDir="${basedir}" destDir="${windows.dir}" eol="crlf">
-            <include name="refine.bat"/>
-            <include name="refine.ini"/>
-            <include name="README.txt"/>
-            <include name="LICENSE.txt"/>
-        </fixcrlf>
-        <fixcrlf file="${conf.dir}/openrefine.l4j.ini" destDir="${windows.dir}" eol="crlf"/>
-
-        <mkdir dir="${dist.dir}"/>
-        <zip destfile="${dist.dir}/openrefine-win-${version}.zip" basedir="${windows.dir}/.." includes="${release.name}/**"/>
-    </target>
-    
-    <target name="linux" depends="jar, prepare_webapp">
-        <mkdir dir="${linux.dir}"/>
-    
-        <copy todir="${linux.dir}/server/lib">
-            <fileset dir="${server.lib.dir}">
-                <include name="**/*.jar"/>
-            </fileset>
-        </copy>
-
-        <copy file="${build.dir}/${fullname}-server.jar" tofile="${linux.dir}/server/lib/${fullname}-server.jar"/>
-
-        <copy todir="${linux.dir}/webapp">
-            <fileset dir="${built.webapp.dir}">
-                <include name="**"/>
-            </fileset>
-        </copy>
-
-        <mkdir dir="${linux.dir}/licenses"/>
-        <fixcrlf srcDir="${basedir}/licenses" destDir="${linux.dir}/licenses" eol="lf"/>
-
-        <fixcrlf srcDir="${basedir}" destDir="${linux.dir}" eol="lf">
-            <include name="refine"/>
-            <include name="refine.ini"/>
-            <include name="README.txt"/>
-            <include name="LICENSE.txt"/>
-        </fixcrlf>
-
-        <mkdir dir="${dist.dir}"/>
-        <tar longfile="gnu" compression="gzip" destfile="${dist.dir}/openrefine-linux-${version}.tar.gz">
-           <tarfileset dir="${linux.dir}/.." filemode="755">
-               <include name="${release.name}/refine"/>
-           </tarfileset>        
-           <tarfileset dir="${linux.dir}/..">
-               <include name="${release.name}/**"/>
-               <exclude name="${release.name}/refine"/>
-           </tarfileset>        
-        </tar>
-    </target>
-
-    <target name="kits" depends="linux,mac,windows" 
-        description="Build kits for all supported platforms">
-    </target>
-    
-    <!-- ================================================================== -->
-
-    <target name="prepare_reports">
-        <mkdir dir="${reports.dir}" />
-    </target>
-
-    <target name="findbugs" depends="build,prepare_reports">
-        <taskdef 
-            name="findbugs" 
-            classname="edu.umd.cs.findbugs.anttask.FindBugsTask"
-            classpath="${findbugs.dir}/lib/findbugs-ant.jar" 
-        />
-        <findbugs jvmargs="-Xmx1024m" home="${findbugs.dir}" output="html" outputFile="${reports.dir}/findbugs.html" >
-          <auxClasspath refid="webapp.class.path" />
-          <sourcePath path="${webapp.src.dir}" />
-          <class location="${webapp.classes.dir}" />
-        </findbugs>        
-    </target>
-    
-    <target name="pmd" depends="prepare_reports">
-        <path id="pmd.path">
-            <fileset dir="${pmd.dir}/lib" includes="*.jar"/>
-        </path>    
-        <taskdef 
-            name="pmd" 
-            classname="net.sourceforge.pmd.ant.PMDTask"
-            classpathref="pmd.path" 
-        />
-        <pmd rulesetfiles="${conf.dir}/pmd.rules.xml" targetjdk="1.8" encoding="UTF-8">
-            <formatter type="html" toFile="${reports.dir}/pmd.html" toConsole="true"/>
-            <fileset dir="${server.src.dir}">
-                <include name="**/*.java"/>
-            </fileset>
-            <fileset dir="${webapp.src.dir}">
-                <include name="**/*.java"/>
-            </fileset>
-            <fileset dir="${server.tests.src.dir}">
-                <include name="**/*.java"/>
-            </fileset>
-        </pmd>
-    </target>    
-
-    <target name="cpd" depends="prepare_reports">
-        <path id="pmd.path">
-            <fileset dir="${pmd.dir}/lib" includes="*.jar"/>
-        </path>    
-        <taskdef 
-            name="cpd" 
-            classname="net.sourceforge.pmd.cpd.CPDTask"
-            classpathref="pmd.path" 
-        />
-        <cpd minimumTokenCount="100" outputFile="${reports.dir}/cpd.txt" encoding="UTF-8">
-            <fileset dir="${server.src.dir}">
-                <include name="**/*.java"/>
-            </fileset>
-            <fileset dir="${webapp.src.dir}">
-                <include name="**/*.java"/>
-            </fileset>
-        </cpd>
-    </target>    
-
-    <target name="jslint" depends="prepare_reports">
-        <path id="jslint.path">
-            <fileset dir="${jslint.dir}" includes="*.jar"/>
-        </path>    
-        <taskdef 
-            name="jslint"
-            classname="com.googlecode.jslint4java.ant.JSLintTask"
-            classpathref="jslint.path" 
-        />
-        <jslint>
-            <formatter type="plain" destfile="${reports.dir}/jslint.txt" />
-            <fileset dir="${webapp.dir}/modules/core/scripts">
-              <include name="**/*.js" />
-            </fileset>
-        </jslint>        
-    </target>    
-
-    <!-- ================================================================== -->
-
-    <target name="prepare_broker" depends="jar_server, build_broker_core">
-        <copy todir="${broker.core.dir}/WEB-INF/lib">
-            <fileset dir="${webapp.lib.dir}">
-                <include name="**/butterfly*.jar" />
-                <include name="**/rhino*.jar" />
-                <include name="**/commons-collections*.jar" />
-                <include name="**/velocity*.jar" />
-                <include name="**/lessen*.jar" />
-                <include name="**/slf4j*.jar" />
-                <include name="**/log4j*.jar" />
-
-                <include name="**/json*.jar" />
-                <include name="**/http*.jar" />
-                <include name="**/jcl*.jar" />
-            </fileset>
-        </copy>
-    </target>
-
-    <target name="prepare_broker_appengine" depends="build_broker_appengine">
-        <mkdir dir="${built.broker.webapp.dir}/appengine" />
-        <mkdir dir="${built.broker.webapp.dir}/appengine/modules" />
-        
-        <copy todir="${built.broker.webapp.dir}/appengine">
-            <fileset dir="${broker.appengine.dir}">
-                <include name="WEB-INF/**"/>
-                <exclude name="WEB-INF/jdo*"/>
-            </fileset>
-        </copy>
-
-        <copy todir="${built.broker.webapp.dir}/appengine/WEB-INF/classes/META-INF">
-            <fileset dir="${broker.appengine.dir}/WEB-INF">
-                <include name="jdo*"/>
-            </fileset>
-        </copy>
-
-        <copy todir="${built.broker.webapp.dir}/appengine/modules/appengine-broker">
-            <fileset dir="${broker.appengine.dir}/module">
-                <include name="**"/>
-                <exclude name="**/lib-src/**"/>
-            </fileset>
-        </copy>
-
-        <copy todir="${built.broker.webapp.dir}/appengine/modules/broker">
-            <fileset dir="${broker.core.dir}/module">
-                <include name="**"/>
-                <exclude name="**/lib-src/**"/>
-            </fileset>
-        </copy>
-                
-        <copy todir="${built.broker.webapp.dir}/appengine/WEB-INF/lib">
-            <fileset dir="${webapp.lib.dir}">
-                <include name="**/butterfly*.jar" />
-                <include name="**/rhino*.jar" />
-                <include name="**/commons-collections*.jar" />
-                <include name="**/velocity*.jar" />
-                <include name="**/lessen*.jar" />
-
-                <include name="**/slf4j-api*.jar" />
-                <include name="**/jcl*.jar" />
-
-                <include name="**/json*.jar" />
-                <include name="**/http*.jar" />
-            </fileset>
-        </copy>
-                
-        <copy todir="${built.broker.webapp.dir}/appengine/WEB-INF/lib" flatten="true">
-            <fileset dir="${appengine.sdk.dir}/lib/user">
-                <include name="**/*.jar" />
-            </fileset>
-        </copy>
-        
-        <replace file="${built.broker.webapp.dir}/appengine/WEB-INF/appengine-web.xml">
-            <replacefilter token="$APPID" value="${appengine.app_id}"/>
-            <replacefilter token="$VERSION" value="${appengine.version}"/>
-        </replace>
-    </target>
-
-    <!-- ================================================================== -->
-
-    <target name="clean_extensions">
-      <ant dir="extensions/" target="clean" />
-    </target>
-
-    <target name="clean" depends="clean_extensions">
-        <delete file="${build.dir}/${fullname}.jar" />
-        <delete file="${build.dir}/${fullname}-server.jar" />
-        <delete dir="${server.classes.dir}" />
-        <delete dir="${webapp.classes.dir}" />
-        <delete dir="${server.tests.classes.dir}" />
-        <delete dir="${broker.core.dir}/module/MOD-INF/classes" />
-        <delete dir="${broker.core.dir}/WEB-INF/lib" />
-        <delete dir="${broker.appengine.dir}/module/MOD-INF/classes" />
-    </target>
-
-    <target name="distclean" depends="clean">
-        <delete dir="${build.dir}" />
-        <delete dir="${dist.dir}" />
-        <delete dir="${tools.dir}" />
-    </target>
-
-</project>
diff --git a/extensions/build.xml b/extensions/build.xml
deleted file mode 100644
index b229e6093..000000000
--- a/extensions/build.xml
+++ /dev/null
@@ -1,36 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<!--+
-    |
-    |  OpenRefine Extensions Build File    
-    |                
-    +-->
-    
-<project name="openrefine-extensions" default="build" basedir=".">
-  <target name="build">
-    <echo message="Building extensions" />
-    <ant dir="sample/" target="build" />
-    <ant dir="jython/" target="build" />
-    <ant dir="gdata/" target="build" />
-    <ant dir="pc-axis/" target="build" />
-    <ant dir="database/" target="build" />
-    <ant dir="wikidata/" target="build" />
-  </target>
-
-  <target name="clean">
-    <echo message="cleaning extensions" />
-    <ant dir="sample/" target="clean" />
-    <ant dir="jython/" target="clean" />
-    <ant dir="gdata/" target="clean" />
-    <ant dir="pc-axis/" target="clean" />
-    <ant dir="database/" target="clean" />
-    <ant dir="wikidata/" target="clean" />
-  </target>
-
-  <target name="test">
-    <echo message="Testing extensions" />
-    <ant dir="jython/" target="test" />
-    <ant dir="database/" target="test" />
-    <ant dir="wikidata/" target="test" />
-  </target>
-</project>
diff --git a/extensions/database/build.xml b/extensions/database/build.xml
deleted file mode 100644
index b6ee98f30..000000000
--- a/extensions/database/build.xml
+++ /dev/null
@@ -1,165 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<!--+
-    |
-    |  OpenRefine Database Extension Build File    
-    |                
-    +-->
-    
-<project name="refine-database-extension" default="build" basedir="." xmlns:jacoco="antlib:org.jacoco.ant">
-
-	<property environment="env"/>
-	
-    <condition property="version" value="trunk">
-        <not><isset property="version"/></not>
-    </condition>
-
-    <condition property="revision" value="rXXXX">
-        <not><isset property="revision"/></not>
-    </condition>
-
-    <condition property="full_version" value="0.0.0.0">
-        <not><isset property="full_version"/></not>
-    </condition>
-
-    <condition property="dist.dir" value="dist">
-        <not><isset property="dist.dir"/></not>
-    </condition>
-	
-	<property name="fullname" value="${name}-${version}-${revision}" />
-	<property name="java_version" value="1.8"/>
-	
-    <property name="refine.dir" value="${basedir}/../../main" />
-    <property name="refine.webinf.dir" value="${refine.dir}/webapp/WEB-INF" />
-    <property name="refine.modinf.dir" value="${refine.dir}/webapp/modules/core/MOD-INF" />
-    <property name="refine.classes.dir" value="${refine.webinf.dir}/classes" />
-    <property name="refine.lib.dir" value="${refine.webinf.dir}/lib" />
-    <property name="refine.tests.lib.dir" value="${refine.dir}/tests/server/lib" />
-    
-    <property name="src.dir" value="${basedir}/src" />
-    <property name="module.dir" value="${basedir}/module" />
-    <property name="modinf.dir" value="${module.dir}/MOD-INF" />
-    <property name="lib.dir" value="${modinf.dir}/lib" />
-    <property name="classes.dir" value="${modinf.dir}/classes" />
-
-    <property name="test.dir" value="${basedir}/test" />
-	<property name="test.src.dir" value="${test.dir}"/>
-	
-	<property name="test.out.dir" value="${basedir}/test-out" />
-    <property name="test.build.dir" value="${test.out.dir}/build" />
-	
-    <property name="test.classes.dir" value="${test.out.dir}/classes" />
-    <property name="test.report.dir" value="${test.out.dir}/report"/>
-    <property name="test.report.html.dir" value="${test.report.dir}/html"/>
-    <property name="test.report.xml.path" value="${test.report.dir}/jacoco.xml"/>
-
-    <path id="class.path">
-        <fileset dir="${lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${refine.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${server.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <pathelement path="${refine.classes.dir}"/>
-    		<pathelement path="${classes.dir}"/>
-    </path>
-	
-	 <path id="extension.tests.class.path">
-	        <path refid="class.path"/>
-	        <pathelement location="${test.classes.dir}"/>
-	        <pathelement location="${refine.tests.lib.dir}/testng-6.8.jar"/>
-	        <fileset dir="${refine.tests.lib.dir}">
-	            <include name="**/*.jar" />
-	        </fileset>
-	 </path>
-	
-	 <taskdef resource="testngtasks" classpath="${refine.tests.lib.dir}/testng-6.8.jar"/>
-	    <taskdef uri="antlib:org.jacoco.ant" resource="org/jacoco/ant/antlib.xml">
-	        <classpath path="${refine.tests.lib.dir}/jacocoant.jar"/>
-	 </taskdef>
-            
-    <target name="build_java">
-        <mkdir dir="${classes.dir}" />
-        <javac  source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${classes.dir}" debug="true" includeAntRuntime="no">
-            <src path="${src.dir}"/>
-            <classpath refid="class.path" />
-        </javac>
-    </target>
-
-    <target name="build" depends="build_java"/>
-	
-	<target name="build_tests" depends="clean, build">
-	        <mkdir dir="${test.classes.dir}" />
-	        <javac source="${java_version}" target="${java_version}" encoding="utf-8" srcdir="${test.src.dir}" destdir="${test.classes.dir}" debug="true" includeAntRuntime="no">
-	            <classpath refid="extension.tests.class.path" />
-	        </javac>
-	        <copy file="${test.src.dir}/log4j-test.properties" tofile="${test.classes.dir}/log4j-test.properties"/>
-	</target>
-	
-	<mkdir dir="${test.build.dir}" />
-	
-    <target name="test" depends="build_tests">
-		<jacoco:coverage destfile="${test.report.dir}/jacoco.exec">
-	            <testng verbose="2" haltOnFailure="true" workingdir="${test.build.dir}"
-	                listener="org.testng.reporters.DotTestListener"
-	                classpathref="extension.tests.class.path">
-	             <xmlfileset file="${test.src.dir}/conf/tests.xml"/>
-	            </testng>
-		</jacoco:coverage>
-        <jacoco:report>
-           <executiondata>
-		   <file file="${test.report.dir}/jacoco.exec"/>
-           </executiondata>
-
-           <structure name="Database extension">
-               <classfiles>
-		       <fileset dir="${classes.dir}"/>
-               </classfiles>
-                <sourcefiles encoding="UTF-8">
-	            <fileset dir="${src.dir}"/>
-                </sourcefiles>
-            </structure>
-		    <html destdir="${test.report.html.dir}"/>
-		    <xml destfile="${test.report.xml.path}"/>
-        </jacoco:report>
-   </target>
-    <target name="dist" depends="build">
-        <mkdir dir="${ext.dir}"/>
-     
-         <copy todir="${ext.dir}/module">
-             <fileset dir="module">
-                 <include name="**/*"/>
-                 <exclude name="**/lib-src/*"/>
-                 <exclude name="**/src/*"/>
-             </fileset>
-         </copy>
-
-         <copy todir="${ext.dir}/licenses">
-             <fileset dir="${basedir}/licenses">
-                 <include name="**"/>
-             </fileset>
-         </copy>
-         <copy file="${basedir}/LICENSE.txt" tofile="${ext.dir}/LICENSE.txt"/>
-         <copy file="${basedir}/README.txt" tofile="${ext.dir}/README.txt"/>
-         
-         <zip destfile="${dist.dir}/openrefine-${fullname}.zip">
-            <zipfileset dir="${ext.dir}/..">
-                <include name="**/**"/>
-            </zipfileset>
-         </zip>
-        
-        <delete dir="${ext.dir}"/>
-    </target>
-
-	 <target name="clean">
-	        <delete dir="${classes.dir}" />
-	        <delete dir="${test.out.dir}" />
-	 </target>
-
-    <target name="distclean">
-        <delete dir="${dist.dir}" />
-    </target>
-</project>
diff --git a/extensions/gdata/build.xml b/extensions/gdata/build.xml
deleted file mode 100644
index 5f52bda74..000000000
--- a/extensions/gdata/build.xml
+++ /dev/null
@@ -1,96 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<!--+
-    |
-    |  OpenRefine GData Extension Build File
-    |
-    +-->
-    
-<project name="grefine-gdata-extension" default="build" basedir=".">
-
-    <tstamp/>
-    <property name="name" value="gdata-extension"/>
-    <property name="version" value="0.1"/>
-    <property name="revision" value="${DSTAMP}${TSTAMP}"/>
-    <property name="dist.dir" value="dist"/>
-    <property name="ext.dir" value="${dist.dir}/${name}"/>
-    <property name="fullname" value="${name}-${version}-${revision}" />
-    
-    <property name="refine.dir" value="${basedir}/../../main" />
-    <!-- We assume that we're a parallel project in an Eclipse workspace.
-         If you're using the SVN layout instead, you want something like:
-    <property name="refine.dir" value="${basedir}/../grefine-all/main" />
-    <property name="server.lib.dir" value="${basedir}/../grefine-all/server/lib" />
-    -->
-    <property name="server.lib.dir" value="${basedir}/../grefine-server/lib" />
-
-    <property name="refine.webinf.dir" value="${refine.dir}/webapp/WEB-INF" />
-    <property name="refine.modinf.dir" value="${refine.dir}/webapp/modules/core/MOD-INF" />
-    <property name="refine.classes.dir" value="${refine.webinf.dir}/classes" />
-    <property name="refine.lib.dir" value="${refine.webinf.dir}/lib" />
-    
-    <property name="src.dir" value="${basedir}/src" />
-    <property name="module.dir" value="${basedir}/module" />
-    <property name="modinf.dir" value="${module.dir}/MOD-INF" />
-    <property name="lib.dir" value="${modinf.dir}/lib" />
-    <property name="classes.dir" value="${modinf.dir}/classes" />
-
-    <path id="class.path">
-        <fileset dir="${lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${refine.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${server.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <pathelement path="${refine.classes.dir}"/>
-    </path>
-            
-    <target name="build_java">
-        <mkdir dir="${classes.dir}" />
-        <javac  source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${classes.dir}" debug="true" includeAntRuntime="no">
-            <src path="${src.dir}"/>
-            <classpath refid="class.path" />
-        </javac>
-    </target>
-
-    <target name="build" depends="build_java"/>
-
-    <target name="dist" depends="build">
-        <mkdir dir="${ext.dir}"/>
-     
-         <copy todir="${ext.dir}/module">
-             <fileset dir="module">
-                 <include name="**/*"/>
-                 <exclude name="**/lib-src/*"/>
-                 <exclude name="**/src/*"/>
-             </fileset>
-         </copy>
-
-         <copy todir="${ext.dir}/licenses">
-             <fileset dir="${basedir}/licenses">
-                 <include name="**"/>
-             </fileset>
-         </copy>
-         <copy file="${basedir}/LICENSE.txt" tofile="${ext.dir}/LICENSE.txt"/>
-         <copy file="${basedir}/README.txt" tofile="${ext.dir}/README.txt"/>
-         
-         <zip destfile="${dist.dir}/openrefine-${fullname}.zip">
-            <zipfileset dir="${ext.dir}/..">
-                <include name="**/**"/>
-            </zipfileset>
-         </zip>
-        
-        <delete dir="${ext.dir}"/>
-    </target>
-
-    <target name="clean">
-        <delete dir="${classes.dir}" />
-    </target>
-
-    <target name="distclean">
-        <delete dir="${dist.dir}" />
-    </target>
-</project>
diff --git a/extensions/jython/build.xml b/extensions/jython/build.xml
deleted file mode 100644
index 3c609f15e..000000000
--- a/extensions/jython/build.xml
+++ /dev/null
@@ -1,131 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<!--+
-    |
-    |  OpenRefine Extension Jython Build File    
-    |                
-    +-->
-   
-<project name="refine-jython" default="build" basedir="." xmlns:jacoco="antlib:org.jacoco.ant">
-
-    <property environment="env"/>
-
-    <condition property="version" value="trunk">
-        <not><isset property="version"/></not>
-    </condition>
-
-    <condition property="revision" value="rXXXX">
-        <not><isset property="revision"/></not>
-    </condition>
-
-    <condition property="full_version" value="0.0.0.0">
-        <not><isset property="full_version"/></not>
-    </condition>
-
-    <condition property="dist.dir" value="dist">
-        <not><isset property="dist.dir"/></not>
-    </condition>
-
-    <property name="fullname" value="${name}-${version}-${revision}" />
-    <property name="java_version" value="1.8"/>
-    
-    <property name="refine.dir" value="${basedir}/../../main" />
-    <property name="refine.webinf.dir" value="${refine.dir}/webapp/WEB-INF" />
-    <property name="refine.modinf.dir" value="${refine.dir}/webapp/modules/core/MOD-INF" />
-    <property name="refine.classes.dir" value="${refine.webinf.dir}/classes" />
-    <property name="refine.lib.dir" value="${refine.webinf.dir}/lib" />
-    <property name="refine.tests.lib.dir" value="${refine.dir}/tests/server/lib" />
-    
-    <property name="src.dir" value="${basedir}/src" />
-    <property name="module.dir" value="${basedir}/module" />
-    <property name="modinf.dir" value="${module.dir}/MOD-INF" />
-    <property name="lib.dir" value="${modinf.dir}/lib" />
-    <property name="classes.dir" value="${modinf.dir}/classes" />
-
-    <property name="extension.tests.dir" value="${basedir}/tests" />
-    <property name="tests.build.dir" value="${extension.tests.dir}/build" />
-    <property name="tests.src.dir" value="${extension.tests.dir}/src" />
-    <property name="tests.classes.dir" value="${extension.tests.dir}/classes" />
-    <property name="tests.report.dir" value="${extension.tests.dir}/report"/>
-    <property name="tests.report.html.dir" value="${tests.report.dir}/html"/>
-    <property name="tests.report.xml.path" value="${tests.report.dir}/jacoco.xml"/>
- 
-    <path id="class.path">
-        <fileset dir="${lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${refine.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <pathelement path="${refine.classes.dir}"/>
-        <pathelement path="${classes.dir}" />
-    </path>
-
-    <path id="extension.tests.class.path">
-        <path refid="class.path"/>
-        <pathelement location="${tests.classes.dir}"/>
-        <pathelement location="${refine.tests.lib.dir}/testng-6.8.jar"/>
-        <fileset dir="${refine.tests.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-    </path>
-
-
-    <taskdef resource="testngtasks" classpath="${refine.tests.lib.dir}/testng-6.8.jar"/>
-    <taskdef uri="antlib:org.jacoco.ant" resource="org/jacoco/ant/antlib.xml">
-        <classpath path="${refine.tests.lib.dir}/jacocoant.jar"/>
-    </taskdef>
-            
-    <target name="build_java">
-        <mkdir dir="${classes.dir}" />
-        <javac  source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${classes.dir}" debug="true" includeAntRuntime="no">
-            <src path="${src.dir}"/>
-            <classpath refid="class.path" />
-        </javac>
-    </target>
-
-    <target name="build" depends="build_java"/>
-
-    <target name="build_tests" depends="build">
-        <mkdir dir="${tests.classes.dir}" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" srcdir="${tests.src.dir}" destdir="${tests.classes.dir}" debug="true" includeAntRuntime="no">
-            <classpath refid="extension.tests.class.path" />
-        </javac>
-        <copy file="${tests.src.dir}/tests.log4j.properties" tofile="${tests.classes.dir}/tests.log4j.properties"/>
-    </target>
- 
-    <mkdir dir="${tests.build.dir}" />
-    <target name="test" depends="build_tests">
-	<jacoco:coverage destfile="${tests.report.dir}/jacoco.exec">
-            <testng verbose="2" haltOnFailure="true" workingdir="${tests.build.dir}"
-                listener="org.testng.reporters.DotTestListener" excludedgroups="broken"
-                classpathref="extension.tests.class.path">
-             <xmlfileset file="${extension.tests.dir}/conf/tests.xml"/>
-            </testng>
-	</jacoco:coverage>
-        <jacoco:report>
-           <executiondata>
-		   <file file="${tests.report.dir}/jacoco.exec"/>
-           </executiondata>
-
-           <structure name="Jython extension">
-               <classfiles>
-		       <fileset dir="${classes.dir}"/>
-               </classfiles>
-                <sourcefiles encoding="UTF-8">
-	            <fileset dir="${src.dir}"/>
-                </sourcefiles>
-            </structure>
-	    <html destdir="${tests.report.html.dir}"/>
-	    <xml destfile="${tests.report.xml.path}"/>
-        </jacoco:report>
-    </target>
-
-
-    <target name="clean">
-        <delete dir="${classes.dir}" />
-        <delete dir="${tests.classes.dir}" />
-        <delete dir="${tests.report.dir}" />
-        <delete dir="${tests.build.dir}" />
-    </target>
-</project>
diff --git a/extensions/pc-axis/build.xml b/extensions/pc-axis/build.xml
deleted file mode 100644
index 3682348d7..000000000
--- a/extensions/pc-axis/build.xml
+++ /dev/null
@@ -1,97 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<!--+
-    |
-    |  OpenRefine PC Axis extension build file
-    |
-    +-->
-    
-<project name="refine-pc-axis" default="build" basedir=".">
-    <property environment="env"/>
-
-    <condition property="version" value="trunk">
-        <not><isset property="version"/></not>
-    </condition>
-
-    <condition property="revision" value="rXXXX">
-        <not><isset property="revision"/></not>
-    </condition>
-
-    <condition property="full_version" value="0.0.0.0">
-        <not><isset property="full_version"/></not>
-    </condition>
-
-    <condition property="dist.dir" value="dist">
-        <not><isset property="dist.dir"/></not>
-    </condition>
-
-    <property name="fullname" value="${name}-${version}-${revision}" />
-  
-    <property name="refine.dir" value="${basedir}/../../main" />
-    <property name="refine.webinf.dir" value="${refine.dir}/webapp/WEB-INF" />
-    <property name="refine.modinf.dir" value="${refine.dir}/webapp/modules/core/MOD-INF" />
-    <property name="refine.classes.dir" value="${refine.webinf.dir}/classes" />
-    <property name="refine.lib.dir" value="${refine.webinf.dir}/lib" />
-    <property name="server.dir" value="${basedir}/../../server" />
-    <property name="server.lib.dir" value="${server.dir}/lib" />
-  
-    <property name="src.dir" value="${basedir}/src" />
-    <property name="module.dir" value="${basedir}/module" />
-    <property name="modinf.dir" value="${module.dir}/MOD-INF" />
-    <property name="lib.dir" value="${modinf.dir}/lib" />
-    <property name="classes.dir" value="${modinf.dir}/classes" />
-
-    <path id="class.path">
-        <fileset dir="${refine.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${server.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <pathelement path="${refine.classes.dir}"/>
-    </path>
-
-    <target name="build_java">
-        <mkdir dir="${classes.dir}" />
-        <javac  source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${classes.dir}" debug="true" includeAntRuntime="no">
-            <src path="${src.dir}"/>
-            <classpath refid="class.path" />
-        </javac>
-    </target>
-
-    <target name="build" depends="build_java"/>
-
-    <target name="dist" depends="build">
-        <mkdir dir="${ext.dir}"/>
-
-         <copy todir="${ext.dir}/module">
-             <fileset dir="module">
-                 <include name="**/*.*"/>
-             </fileset>
-         </copy>
-
-         <copy todir="${ext.dir}/licenses">
-             <fileset dir="${basedir}/licenses">
-                 <include name="**"/>
-             </fileset>
-         </copy>
-         <copy file="${basedir}/LICENSE.txt" tofile="${ext.dir}/LICENSE.txt"/>
-         <copy file="${basedir}/README.txt" tofile="${ext.dir}/README.txt"/>
-
-         <zip destfile="${dist.dir}/openrefine-${fullname}.zip">
-            <zipfileset dir="${ext.dir}/..">
-                <include name="**/**"/>
-            </zipfileset>
-         </zip>
-
-        <delete dir="${ext.dir}"/>
-    </target>
-
-    <target name="clean">
-        <delete dir="${classes.dir}" />
-    </target>
-
-    <target name="distclean">
-        <delete dir="${dist.dir}" />
-    </target>
-</project>
diff --git a/extensions/sample/build.xml b/extensions/sample/build.xml
deleted file mode 100644
index 42e918946..000000000
--- a/extensions/sample/build.xml
+++ /dev/null
@@ -1,71 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<!--+
-    |
-    |  OpenRefine Extension Sample Extension Build File    
-    |                
-    +-->
-    
-<project name="refine-sample-extension" default="build" basedir=".">
-
-    <property environment="env"/>
-
-    <condition property="version" value="trunk">
-        <not><isset property="version"/></not>
-    </condition>
-
-    <condition property="revision" value="rXXXX">
-        <not><isset property="revision"/></not>
-    </condition>
-
-    <condition property="full_version" value="0.0.0.0">
-        <not><isset property="full_version"/></not>
-    </condition>
-
-    <condition property="dist.dir" value="dist">
-        <not><isset property="dist.dir"/></not>
-    </condition>
-
-    <property name="fullname" value="${name}-${version}-${revision}" />
-    
-    <property name="refine.dir" value="${basedir}/../../main" />
-    <property name="refine.webinf.dir" value="${refine.dir}/webapp/WEB-INF" />
-    <property name="refine.modinf.dir" value="${refine.dir}/webapp/modules/core/MOD-INF" />
-    <property name="refine.classes.dir" value="${refine.webinf.dir}/classes" />
-    <property name="refine.lib.dir" value="${refine.webinf.dir}/lib" />
-    <property name="server.dir" value="${basedir}/../../server" />
-    <property name="server.lib.dir" value="${server.dir}/lib" />
-    
-    <property name="src.dir" value="${basedir}/src" />
-    <property name="module.dir" value="${basedir}/module" />
-    <property name="modinf.dir" value="${module.dir}/MOD-INF" />
-    <property name="lib.dir" value="${modinf.dir}/lib" />
-    <property name="classes.dir" value="${modinf.dir}/classes" />
-
-    <path id="class.path">
-        <fileset dir="${lib.dir}" erroronmissingdir="false">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${refine.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${server.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <pathelement path="${refine.classes.dir}"/>
-    </path>
-            
-    <target name="build_java">
-        <mkdir dir="${classes.dir}" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${classes.dir}" debug="true" includeAntRuntime="no">
-            <src path="${src.dir}"/>
-            <classpath refid="class.path" />
-        </javac>
-    </target>
-
-    <target name="build" depends="build_java"/>
-
-    <target name="clean">
-        <delete dir="${classes.dir}" />
-    </target>
-</project>
diff --git a/extensions/wikidata/build.xml b/extensions/wikidata/build.xml
deleted file mode 100644
index f3e01d188..000000000
--- a/extensions/wikidata/build.xml
+++ /dev/null
@@ -1,133 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<!--  Google Refine Wikidata Extension Build File +-->
-    
-<project name="refine-wikidata-extension" default="build" basedir="." xmlns:jacoco="antlib:org.jacoco.ant">
-
-    <property environment="env"/>
-
-    <condition property="version" value="trunk">
-        <not><isset property="version"/></not>
-    </condition>
-
-    <condition property="revision" value="rXXXX">
-        <not><isset property="revision"/></not>
-    </condition>
-
-    <condition property="full_version" value="0.0.0.0">
-        <not><isset property="full_version"/></not>
-    </condition>
-
-    <condition property="dist.dir" value="dist">
-        <not><isset property="dist.dir"/></not>
-    </condition>
-
-    <property name="fullname" value="${name}-${version}-${revision}" />
-    <property name="java_version" value="1.8"/>
-    
-    <property name="refine.dir" value="${basedir}/../../main" />
-    <property name="refine.webinf.dir" value="${refine.dir}/webapp/WEB-INF" />
-    <property name="refine.modinf.dir" value="${refine.dir}/webapp/modules/core/MOD-INF" />
-    <property name="refine.classes.dir" value="${refine.webinf.dir}/classes" />
-    <property name="refine.lib.dir" value="${refine.webinf.dir}/lib" />
-    <property name="server.dir" value="${basedir}/../../server" />
-    <property name="server.lib.dir" value="${server.dir}/lib" />
-    <property name="refine.tests.lib.dir" value="${refine.dir}/tests/server/lib" />
-    <property name="refine.tests.classes.dir" value="${refine.dir}/tests/server/classes" />
-
-    
-    <property name="src.dir" value="${basedir}/src" />
-    <property name="module.dir" value="${basedir}/module" />
-    <property name="modinf.dir" value="${module.dir}/MOD-INF" />
-    <property name="lib.dir" value="${modinf.dir}/lib" />
-    <property name="classes.dir" value="${modinf.dir}/classes" />
-
-    <property name="extension.tests.dir" value="${basedir}/tests" />
-    <property name="tests.build.dir" value="${extension.tests.dir}/build" />
-    <property name="tests.src.dir" value="${extension.tests.dir}/src" />
-    <property name="tests.classes.dir" value="${extension.tests.dir}/classes" />
-    <property name="tests.report.dir" value="${extension.tests.dir}/report"/>
-    <property name="tests.report.html.dir" value="${tests.report.dir}/html"/>
-    <property name="tests.report.xml.path" value="${tests.report.dir}/jacoco.xml"/>
-
-    <path id="class.path">
-        <fileset dir="${lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${refine.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <fileset dir="${server.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-        <pathelement path="${refine.classes.dir}"/>
-        <pathelement path="${classes.dir}" />
-    </path>
-
-     <path id="extension.tests.class.path">
-        <path refid="class.path"/>
-        <pathelement location="${tests.classes.dir}"/>
-        <pathelement location="${refine.tests.classes.dir}"/>
-        <pathelement location="${refine.tests.lib.dir}/testng-6.8.jar"/>
-        <fileset dir="${refine.tests.lib.dir}">
-            <include name="**/*.jar" />
-        </fileset>
-    </path>
-
-    <taskdef resource="testngtasks" classpath="${refine.tests.lib.dir}/testng-6.8.jar"/>
-    <taskdef uri="antlib:org.jacoco.ant" resource="org/jacoco/ant/antlib.xml">
-        <classpath path="${refine.tests.lib.dir}/jacocoant.jar"/>
-    </taskdef>
-            
-    <target name="build_java">
-        <mkdir dir="${classes.dir}" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" destdir="${classes.dir}" debug="true" includeAntRuntime="no">
-            <src path="${src.dir}"/>
-            <classpath refid="class.path" />
-        </javac>
-    </target>
-
-    <target name="build" depends="build_java"/>
-
-    <target name="build_tests" depends="build">
-        <mkdir dir="${tests.classes.dir}" />
-        <javac source="${java_version}" target="${java_version}" encoding="utf-8" srcdir="${tests.src.dir}" destdir="${tests.classes.dir}" debug="true" includeAntRuntime="no">
-            <classpath refid="extension.tests.class.path" />
-        </javac>
-        <copy file="${tests.src.dir}/tests.log4j.properties" tofile="${tests.classes.dir}/tests.log4j.properties"/>
-    </target>
- 
-    <target name="test" depends="build_tests">
-	<jacoco:coverage destfile="${tests.report.dir}/jacoco.exec">
-            <testng verbose="2" haltOnFailure="true" workingdir="${extension.tests.dir}"
-                listener="org.testng.reporters.DotTestListener" excludedgroups="broken"
-                classpathref="extension.tests.class.path">
-             <xmlfileset file="${extension.tests.dir}/conf/tests.xml"/>
-            </testng>
-	</jacoco:coverage>
-        <jacoco:report>
-           <executiondata>
-		   <file file="${tests.report.dir}/jacoco.exec"/>
-           </executiondata>
-
-           <structure name="Wikidata extension">
-               <classfiles>
-                    <fileset dir="${classes.dir}" />
-               </classfiles>
-                <sourcefiles encoding="UTF-8">
-	            <fileset dir="${src.dir}"/>
-                </sourcefiles>
-            </structure>
-	    <html destdir="${tests.report.html.dir}"/>
-	    <xml destfile="${tests.report.xml.path}"/>
-        </jacoco:report>
-    </target>
-
-    <target name="clean">
-        <delete dir="${classes.dir}" />
-        <delete dir="${tests.classes.dir}" />
-        <delete dir="${tests.report.dir}" />
-        <delete dir="${tests.build.dir}" />
-    </target>
-</project>
-