Change css for div to class

Change selector div to class .canvas, since the css conflicted with the
debug screen of CAAT
Remove depreciated method and model
Add method for controlling camera in sceneModel

- Movement condition has not been implemented yet. This method is for
now just a template for making the camera move!
- Tesing add a dynamic box to the scene to see physics collisions and
rotations
Camera function

- Deleted depriciated camera method and replaced by a new Camera Class
- Camera is now able to focus its center on a body.

TODO:
- methods to change Camera focus and properties
- properties allow panning on single axis
- methods to allow zooming perhaps?
disable Debug
minor changes
Merge branch 'gh-pages' into development
Keyboard Listeners Add and Remove
Camera free panning feature and keyboard listener fix

- Camera free panning feature
- Fix keyboard listener
- Add a demo of adding keyboard listener in main.js
- Add ability of being hit for boxes
Merge branch 'development'
change title