1. Make a proper responsive navbar, using a customized version of the Bootstrap lib. 2. Fix a bug where the state name was not displaying on the state editor page.
Fix the BUILD script to not delete the new Bootstrap files. Fix a typo.
Upgrade tests to use GAE 1.7.7
Update welcome exploration
Creates top ten improvable states statistics analysis
Merge branch 'master' of https://code.google.com/p/oppia
Fix lint and type-conversion errors in the statistics model
Add an iframe widget.
Small refactoring of the statistics model, in preparation for adding tests.
Add unit tests for statistics model.
Change the rich text editor to YUI 2. Fix a bug in image editing.
Remove superfluous () calls. Remove unused code.
Modify the list directive so that replacements can be done in-place.
Improve the editing experience for the string directive.
Remove superfluous scope.apply() calls. Remove unused code.
Modify the list directive so that replacements can be done in-place.
Improve the editing experience for the string directive.
Merge branch 'master' of https://code.google.com/p/oppia
Make the iframe widget check the appropriate event origin.
Refactor the state model, breaking up a long method and making the logic clearer.