Merge pull request #81 from spilgames/#77-return-scaled-dimensions

- Fixed scalable on animatable.
Added atTarget callback for fadables
Created an example for screen scrolling
Added a very rough outline for the technique that could be used to scroll a screen
made working example for scrolling
added scroll factor to visible and animatable components
added scaling to example index
removed returning context in fadable component because it’s not needed
updated fadable example
Merge pull request #85 from spilgames/83-game-screen-scrolling

83 game screen scrolling
added rounding of mouse position to scrolling example, the animation frames need proper rounding, so they show up correctly
removed old loader test code
- moved DomReady check to Glue’s setup function so it’s never needed on implementation side
- updated all examples (removed DomReady)
Merge pull request #90 from spilgames/89-domready-to-glue

89-domready-to-glue