remove instances of @edx.org email addresses in our default settings

Bug: LMS-1363
Fixing accessibility bug where users could not tab through on wiki

LMS-1307
student.tests: Added db access in mock_render_to_response() to test any issues with @transaction.commit_manually
student.views.confirm_email_change: commit/rollback transaction after rendering response instead of before
Be explicit, avoid bugs.

unbalanced quote.

adding to watch command

fixing watch
Add an upgrade parameter to the verification views.
Add in new hooks for the dashboard into the upgrade path.
Add acceptance tests.
LMS: preps track selection view for upgrade cases
LMS: preps track selection view for upgrade cases
Fixed LMS-1062
Add new acceptance test for complete upgrade flow
LMS: revises styling/placement of message for verified status on dashboard
LMS: adds in UI and styling for verified track upgrade to dashboard view
Move more logic into the views

Also includes some tests

Story: LMS-1127
Fix up acceptance tests for upsell.

LMS-1127
Add css mode to the compressed file.

STUD-833
Cheatsheet modal is accessible.

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

LMS-1303
Added a [code] block to the problem markdown parser

Adds a code block to the problem markdown parser that translates
[code]
TestTest
[/code]
to
<pre><code>
TestTest
</code></pre>
Studio: revises CSS reference/pipeline architecture for better organization, reduced redundancy, and to handle IE9 selector limits