Make remaining dialogs in wiki accessible.

All the dialogs in the wiki are now accessible to screen readers.

Also, the "Switch to selected version" button did the odd thing of
reloading the page with the new version selected, but inside a dialog.
That is now fixed.

The merge dialog has a warning that looks kind of funky still, but you
can read it, unlike the previous code.

LMS-1337

Broken image in Studio component help sidebar

Merge rc/2013-11-21 to master

STUD-981

Revert PR 1711; disabling JS tests again

Refunding CertificateItem now marks parent Order refunded as well

Convert component.py to use RESTful URLs.

"as_published" changes I previously put in, as now we
are not adding @draft to locations converted from locators.

STUD-844

Enable all video Jasmine tests

BLD-463

Add error recovery to inline discussion loading

Jarv/verified certs

Added LMS_BASE to devstack settings to enable View Live in Studio

Adding Codekit IDE assets/config to .gitignore

fixes a branding test which was passing for a trivial (wrong) reason

Fix LMS-1532 (partially instantiated XModules after an exception)

Fix for [LMS-1528], plus Changelog entry for the related feature

Also cleans up test_view_authentication to use user factories for
various user classes

Add release notes for 061a46be, concerning change to beta-tester groups

Code response improvements.

Sarina/dormsbee grades download

This guarantees that the ErrorModule will be created, instead of
potentially using a partially instatiated broken module. Fixes
[LMS-1532].

remove field_data_cache from grades.grade and grades.progress_summary

cleans grading code by adding wrappers

Ned/pr 1745 lms 1492

Webob represents uploaded files as cgi.FieldStorage objects.  The
XModule code expects pure Python file objects.  Each FieldStorage object
is wrapped to present the proper file interface, with file names.

LMS-1492

One test passes already, the other fails.  Fix in next commit.

These changes prepare for the changes to the tests that are coming, but
make no change to the behavior themselves.

LMS-1492: Convert between webob's cgi.FieldStorage uploaded files to pure file objects.