Moved canvas creation into Metrics module
Allow animations to continue running on end of game
Move game data setup into Game module
Move cell width/height calculations into Metrics module
Remove Hammer.js and added swipe recognition
Added rendering of current and top scores
Fix score box sizing in iOS
Fix tile growth for pixel dense screens
Add new tasks
Render "Play Again" button for game over/game won
Move size/position of "Play Again" into Metrics
Don't show highlight on canvas touch on Android