Moved data loading functions into a separate module.
Undo changes made to default server address.
Removed unused variable.
Split views into several blueprints.
Moved Flask initialization code into create_app function.
Moved server.py file out of acousticbrainz package.
Fixed references to views.
Updated incorrect reference to variable in config file.
Code style tweaks.
Replaced custom UUID validator with Flask-UUID extension that allows marking UUIDs in routes.