Extends the common capa response types (string, numeric, multiple
choice, checkbox, dropdown) with feedback and hint
capabilities. "Feedback" refers to feedback shown to the student when
they check the problem, looking at their specific answer. "Hints"
refers to a Hint button in LMS which the student can click at any time
to see hints for that problem. The implementation extends the markdown
syntax to include feedback and hints. There are new Feedback-and-Hint
specific templates in Studio when the author clicks to add a new
problem.

added a new aria-live region and added problem html into that.
Removed submission buttons out of the aria-live div scope.

TNL-1699

Assessment problems was having input type="button" which cause accessibility issues.
changed them to <button> and added span with class sr.

TNL-1693

TNL-568
TNL-588
TNL-595

 Committer: Adam Palay <adam@edx.org>

- update appropriate jasmine tests so that stubbed $postWithPrefix
respects a subset of jQuery promise API.
- add customization for checking state.
- display checking state while button is disabled.
- ensure checking state lasts for at least a second.

a page level javascript SR object to enable reading of alert messages.
LMS-2158

Removed inappropriate section tags. Because screen readers announce each section, they should not be used unless they are actually defining meaningful sections.

- apparently have to define functions before using them...

to show quickedit when settings.QUICKEDIT is True.  add
mathjax_include.html because that is needed by quickedit.html

Changed the format of the check/submit button so that the exam
submission makes more sense; added a disclaimer to the enrollment
number so that new students know that they will be disadvantaged.

--HG--
branch : kf-courseware

--HG--
branch : kf-refactor