Start compatibility with the new Django test runner
Let nose collect the tests itself
Set in environnement a custom NOSE_TESTMATCH variable since the tests are not collected manually and setup_test_template_loader is considered like a test case for Nose
Remove disconnection of the signals when loading the zinnia.tests modules for compatibility
No more warnings with nose
No more warnings when launching the tests with django
Disconnect signals where needed
Reduce number of queries in tests of views
Fix views tests with timezones superior at GMT
Merge branch 'feature/compatibility-with-new-test-runner' into develop