Consolidate javascript at the bottom of the page and in a minimal number of django-pipeline groups

Sort by course number. Simplify university grouping.

Javascript slim

Removed a bunch of non-necessary javascript from homepage. Most of it was put back in courseware. A new PIPELINE_JS group 'courseware' was created, for pipeline javascript files that should only be in the courseware.

Dormsbee/change reg fields

Added a favicon.

Smooth registration

Unenroll

Dormsbee/copy edits 3

Cleaned up activation pages. Added "Log In" link to notice when anonymous user tries to enroll in course.

Fortunately, the migrations that were lost won't mess things up. One
is a modification of country, which we're dropping anyway. Another
affects location, which is fine to leave as it was.

If a user is anonymous when they click the enroll button, they will automatically be enrolled in the course if they immediately log in our create an account.

The static press page is getting edited a lot in terms of both
content and styling. I didn't want to the RSS thing until we
figured out what it's supposed to look like and need in terms of
fields. I didn't want to add a view entry, urls.py, etc. for this,
so for now it just uses an Article namedtuple inline to make
updates a little easier.