added the option of using S3 for storing static files (other settings in the mediathread-openshift-quickstart repo)
using a newer version of django compressor, minify css files
fix for the login view (call to action additions)
style changes to "no courses" page
Merge pull request #27 from appsembler/feature/137-use-django-storages-for-s3

#137 - use django storages for S3 static file serving
added join sample course view
Merge branch 'refs/heads/appsembler_develop' into feature/146-sample-course-enroll-option

Conflicts:
	requirements/base.txt