apply 'moviecounts' changes to the homepage.
check if username given is in User tables
separate errors for username conflicts in FacilityUser and User
fix form validation errors
fix expected error message
fix return data of clean_username
To decorate a decorator, decorate the inner function.
css tweaks for more pleasant homepage
Merge pull request #479 from jamalex/fix_central_server_complete_and_utter_brokenness

To decorate a decorator, decorate the inner function.
Add font mimetype to avoid warnings on exercise pages.
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into moviecounts_homepage

Conflicts:
	kalite/main/views.py
cleanup form tests
Merge pull request #469 from aronasorman/375

[WIP] check if username given is in User tables
Merge pull request #481 from jamalex/add_mimetypes

Add font mimetype to avoid warnings on exercise pages.
Merge branch 'release-0.10' into fix_ie_video