Code formatting.
django.utils.functional.update_wrapper() removed in Django 1.6.
Added TablibAdmin to django_tablib.__init__.__all__.
Added django_tablib to INSTALLED_APPS for testproject.settings.
Added TestModel to admin in testproject.
Turned django_tablib.admin into a module.
Typo.
Added admin actions.
Added admin actions to TestModelAdmin in testproject.
Merge branch 'feature/admin-improvements' into develop