Fix broken jasmine tests for CMS. All (11) specs are now passing.

cms/static/coffee/files.json

@@ -3,6 +3,6 @@
     "/static/js/vendor/jquery.min.js",
     "/static/js/vendor/json2.js",
     "/static/js/vendor/underscore-min.js",
-    "/static/js/vendor/backbone.js"
+    "/static/js/vendor/backbone-min.js"
   ]
 }