Remove '/' route

This was a debug code I forgotten to remove.
Merge branch 'users-blueprint'

* users-blueprint:
  Remove '/' route
Move config loading to a separate file

Also, switch from Python to YAML
Seed database

Create users from app.config['DATABASE_SEED']. More classes can
be added by importing them into models/__init__.py.
Merge branch 'database-seed'

* database-seed:
  Seed database
  Move config loading to a separate file