test cleanup
Merge branch 'floppify-auth-forms' of git://github.com/gregmuellegger/django-admin2 into gregmuellegger-floppify-auth-forms
Merge pull request #135 from gregmuellegger/runtests-args

Allow runtests.py to take positional arguments to specify only a subset of tests to run.
Implementing a class-based permission handling.
Moving permission logic of views into its own mixin. Also allow to check permission on other views via the PermissionMixin.
Adding the ability to check for permissions in templates.