Added websocket-rails gem.
Ran websocket_rails install generator.
Removed Rack::Lock.
Moved require websockets js to application.js
Level#update now publishes to "level<id>" channel.
Player#update now publishes to "level<id>" channel.
Updated Player#update to publish on level change.
Switched level route data update from polling to websocket.
Added levelChannel binding to game view.
Switched to only render canvas on level update.