Moved user profile model from devmo into users app.

- This also gets rid of lots of unused/unwanted code in the users app, e.g. email change model.
- Moved over tests and fixtures.
- Combines URL patterns of users and profile views.
Fixed templates after app move.

- deletes lots of unused template files
- removes links to removed views, e.g. old register view
- adds a simplified way to refer to user profile URLs `{{ <user>.get_absolute_url() }}`
Added initial events migration. This needs to be faked.
Removed all the devmo migrations and add users app migrations.
Grant permissions to all tables to be able to create test database.
Minor cosmetic changes.
Removed unneeded rendering of the send_email_reminder form as it doesn't make sense anymore.
Use correct form to show errors for.
Add comment about a broken markup rendering.