Cosmetic Changes to apps.py

This changes apps.py to remove some empty lines to make it more
readable.
Changes App File Import

This makes a minor change to the fab __init__.py file that imports the
apps dictionary instead of importing apps.apps from apps or whatever
crazy thing we were doing before.
Database Fab Module Checks for Database in App

This modifies the database module in fabric so that it checks to see if
the app contains a database and then sets it up. Since not all apps have
databases, this keeps it from crashing when the database module does its
thing.