* updating vendor files
* updating class syntax (to new FA-based classes) for all UI elements
* correcting broken tests

Delete lms/static/admin resources as they are no longer needed
for the admin page as of Django 1.4

Moved two files that were referenced elsewhere:
lms/static/admin/js/jquery.min.js -> lms/static/js/admin/jquery.min.js
lms/static/admin/js/urlify.js -> lms/static/js/admin/urlify.js

remove unnecessary code, and clarify what it's doing.

LMS-2156

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

LMS-1309

Use the leanModal stuff to show the cheatsheet dialog in the wiki.

LMS-1303

LMS-1306

with vision impairments

* bold text when active
* add in some extra text for screen readers

LMS-1306

fixes template errors

keep tos untranslated

formatting fixes