Wide refactor of style and hacks
Restore the form to change the background image
Add server-side checking, feedback and saved state
Segregate also the student_view javascript selection
Kill some Studio unused code
Remove dependency on underscore for logic and refactor
Kill some unused CSS
Introduce grading
Fix: removed a critical callback during refactor
Move the templates out of .js and use Handlebars
Correctly detect a finished state also when there is not feedback
Add a README
Fix the 3px high line at the bottom of the Studio view
Avoid a useless JSON serialization of the data
Fix do_attempt crash on incorrect tries
Add a Python test suite running in the workbench
Support incremental editing in the Studio view
Merge pull request #2 from FiloSottile/refactor

Iteration and wide refactor