Adding tests for submit function based views.

Requires addition of mock library to remove difficulty of manipulating sessions in django test client.  This allows me to mimic the behaviour of a user session in the submit view for an existing survey response.

Have added tests around form validation rules.

Adding base scaffolding for bootstrap theme.

Moving validating into model for cleaner forms.

New UI layout to take advantage of bootstrap.

Moving score (1-10) and word validation (RegEX) into model class as step toward cleaner forms.