Merge pull request #228 from aethemba/refaktor

Refaktor
fixed some errors in the imports after renaming
added other fixes for app renaming
bb_accounts instead of accounts
Merge pull request #229 from MG84/refaktor

fixed some errors in the imports after renaming
Fixed `bb_accounts` app name in settings and URLs.
`bb_accounts` unit tests reactivated.
`bb_accounts` tests now using the test model.
added extra checks on user model tests
added unit test for abstract base classes for bb_projects. Also commented parts of imports and factories that use models that should go