Added devise to gemfile, removed mysql2.
devise init.
cleanup of silly old code.
more devise stuff.
Removed password_hash and salt from users.
Added authentication_token to users
deleted more old authentication stuff.
initial api commit.
Set up Rspec:
    - Deleted Rails UnitTest;
    - Added Rspec;
    - Initial Rspec configuration;
    - Created specs for controllers, models.
Restructurization of controllers for Devise authentication.
Enforce available locales to get rid of rails warning.
renamed methods to describe their purpose.
Registrations controller now responds only to json.
removed rspec/autorun so zeus doesn't run specs twice.
Some tweaks:
     - Registrations spec cleanup;
     - Token authentication doesn't require email anymore.
Now using custom routing (instead of Devise routing).
Added sessions controller.
Added update_location action to registrations controller.
Devise now signs User out before deleting it.
Authenticate User from token now signs user in.