to User model

- It is now possible to run tests in the frontend.
- The backend authentication uses AbstractUser instead of
AbsstractBaseuser

Added has_perm() and has_module_perm() to UserAccount model. Both return is_superuser . This allows superusers to access AdminPanel.

AdminPanel now displays usernames in User ListView.

The project has been refactored so far as the current state of master has been placed under backend/ .
Some changes to the .gitignore and Makefile have been made to accomodate this refactor.