Merge lp://staging/~zyga/django-testscenarios/0.6 into lp://staging/django-testscenarios

Fix design issue and release 0.6

The design issue was related to way django-testproject worked. It previously assumed that local test project would always have the name 'test_project'. This turned out to be a bad decision because of the way django double-imports settings with different paths. With simple scenario it could lead to wrong test_project being imported (different one in each python process).

To fix this I had to break backwards compatibility. There are few ways this affects users:

1) Instead of django_testproject.tests.run_tests() you must use django_testproject.tests.run_tests_for() and call it with the name of your settings module ("myapp.test_project.settings"). The old call is retained and works as before but is now deprecated.

2) To make it possible to import django_testscenarios.test_project directly I had to move some code from django_testproject/__init__.py into sub-module. This affects anyone who imported test cases from that package. They are all now in django_testscenarios.ubertest. This breaks compatibility directly.