Added a test file to test some stuff.
Uses the Pytest testing tool. A setup and teardown function have been defined in the classic xUnit-style.
The first test function verifies that the Gravatar URLs are generated correctly. The avatar is hardcoded into the test and checked against the one returned by User.
The second test verifies that the make_unique_nickname indeed is working properly.
Committing version 3 of the DB.
Modified the config.py file to test email server settings.
Still haven't gotten it working, might want to go the Python mailserver route later.