Removed get_queryset() collisions.
Added regression test for unexpected 'is_for_detail' arg bug.
Refactored get_queryset() to get_queryset_detail() to avoid collisions.
Fixes #24. Removed get_queryset() collisions.
Added pypi badges
Usage of django.core.cache.caches for django>=1.7. Fixes #26
Merge branch 'master' into gh-pages