Camera platformer movement, zoom i/o + bug fixes

Camera now has zoom in out controlls.
*Deprecated touchBegan in favour of touchesBegan
Camera now has an important area - very useful for platformer games.
Fix an issue with animations and camera movement.
Code changes for Windows Phone 8 missing c++ func.
Camera zoom, physics bug fixes, versions update
Merge pull request #12 from vladubogdan/develop

Camera zoom & more