include proper number of tiles do draw on Tilemap
Merge pull request #129 from fserb/offbyone

include proper number of tiles do draw on Tilemap
fix canvas render on native
Initial text color was preventing correct color change under buffer render mode.
HTML5 No memory information.
HTML5 Fix compile for Data class.
Improving documentation
Using tile index returned from addTileRect
Merge pull request #130 from fserb/canvas

fix canvas render on native
adds getBounds() to Image class
Always output bounds in local coordinate
New Imagemask mask
Move getBounds to Imagemask
fix AtlasData to support Imagemask

- create() doesn't work on C++ code if receiving a BitmapData
- createRegion() doesn't copy Rect/Point which could cause reusing the same value.
Add collidePixelmask() for non flash targets using BitmapData