2.0.0

• refactor(all): change the set function to be called init since it's doing more than just setting properties, it's also giving defaults and initializing other properties
• refactor(sprite): change vector.init to take an object of properties instead of x,y to match all other init calls
• refactor(sprite): made the advance and draw helper functions private (advanceSprite, advanceAnimation, drawRect, drawImage, drawAnimation)
• refactor(animation): change frameSpeed to frameRate for better api
• refactor(animation): make advance and draw functions private
• chore(coverage): adding code coverage using coveralls.io
• test(gameLoop): add tests for gameLoop.js
• test(quadtree): add tests for quadtree.js
• test(sprite): add tests for sprite.js
• test(spriteSheet): add tests for spriteSheet.js
• test(tileEngine): add tests to tileEngine.js
• docs(examples): fix examples to use current api