New ui object
  - All drawing is done v/ ui.js
  - game use ui and now only contains game logic
Stickers implemented + collision manager

  - you have to capture stickers to win points
  - collision between a player and a sticker implemented
Create a new random sticker when a player get one
Games now have a score max. When it's reached a new game is launched
Score and color displayed on mobile

  - Score for the player on his mobile
  - Player color displayed on his mobile
  - Events renamed
  - Ball colors order changed
  - Design improvements for Nexus 4
Collision with a sticker from your color = sticker value * 2
Add vibration to the client when available