add _really_ basic multilanguage support. I'll come back for css later

www/code/modes.js

@@ -0,0 +1,13 @@
+define(function () {
+    return [
+        "Javascript javascript",
+        "Python python",
+        "Mixed_HTML htmlmixed",
+    ].map(function (line) {
+        var kv = line.split(/\s/);
+        return {
+            language: kv[0].replace(/_/g, ' '),
+            mode: kv[1]
+        };
+    });
+});