bring back the graph

templates/challenge-all-submissions.hamlet

@@ -2,3 +2,8 @@
             <p>This is a long list of all submissions, if you want to see only the best, click <a href="@{ShowChallengeR (challengeName challenge)}">leaderboard</a>.
 
 ^{Table.buildBootstrap (submissionsTable tests) submissions}
+
+<div id="graph-container">
+
+<script src="/static/js/sigma.min.js">
+<script src="/static/js/sigma.parsers.json.min.js">

templates/challenge.lucius

@@ -9,3 +9,8 @@
     overflow: hidden;
     left-margin: 5px;
 }
+
+#graph-container {
+    height: 400px;
+    margin: auto;
+}