Added {COURSE_STATIC_URL} format key for about section html. Changed get_about_section to be get_course_about_section in courseware.courses.

Display registered when already registered for a course.

The about image is now pulled from the course data directory and shown on the homepage, about course, and dashboard. Working on a way to show other, arbitrary course images.

Force dataType to 'text json'

Ignore registrations for Courses that can't be found

Dormsbee/course images

Fix sign up styles.

Conflicts:
	lms/templates/index.html

Moved lms/static/images/portal-icons/ to lms/static/portal-icons/, because collecstatic wants it there. We should figure out why, but it was blocking the build.

Store rss instead of parser in memcache.