Add MEDIA_* parameters if not present
Add tests for MEDIA_* parameters
Check filer plugins if filer is enabled
Properly install filer plugins in settings
Add tests for filer plugins and proper static directory creation
Create static dirs
Install six in all environments
Use Django 1.6 with CMS version 3 if stable is selected.
Merge pull request #73 from nephila/feature/media_fix

Filer, media and static files fixes