- added 'findbugs' command that uses the findbugs static analyzer to look for problems in the code
- fixed a bunch of issues that findbugs found (a few methods would go a little faster, and a few NPE will be avoided... nothing major but good to have)
git-svn-id: http://google-refine.googlecode.com/svn/trunk@382 7d457c2a-affb-35e4-300a-418c747d4874