Added setting to disable find courses links
Renamed setting ENABLE_STUDENT_SELF_ENROLLMENT to COURSES_ARE_BROWSABLE
If setting COURSES_ARE_BROWSABLE is off return 404 on /courses
Removed hardcoded case for edge for /courses
Updated copy in dashboard
Move Pearson courseware imports to function level.
An assortment of small OE changes, both for ICE and standard

- Changed save OE message text
- Fix ICE legend positioning and content
- Add space to "offensive" checkbox
- Change tracker variable in undo to correct one
Merge pull request #1158 from edx/giulio/small-oe-fixes

An assortment of small OE changes, both for ICE and standard
Merge pull request #1160 from edx/brian/fix-extauth-courseware-import

Move Pearson courseware imports to function level.
Merge pull request #1073 from edx/usman/lms1026-find-courses-link-optional

Added setting to disable 'find courses' links
Move nose/django arguments for tests out of rake so that raw manage.py works when running tests