moved dedicated input instance to main
camera as part of the environment
removed unnecessary parameter
removed init function from game
added load function stub in Loader
use loader to suspend starting the game until all known resources are
loaded
moved audio to environment
removed unnecessary dependencies for game.js
added files for bitmap rendering
added sample entity and call its update and debugDraw functions
introduced aabb for entity
introduced abstract Renderer
added sample bitmap
made Renderer part of environment
added abstract class Resource
removed drawCallbacks from debugDraw
added draw function to Renderer
removed renderer property in MapScene
draw sample bitmap
draw rectangular bitmaps using AnimationFrames