Merge pull request #1329 from tschneidereit/nat

More TS conversion for SWF parser things
More documentation
Merge branch 'nat' of github.com:mozilla/shumway into nat
Merge pull request #1330 from tschneidereit/nat

Actually export Shumway.SWF.Parser.defineFont
anchor label to left edge
Move renderables to its own file.
Fix rgba - argb conversion.
Create canvases from bitmap data, and some renaming.
Fix compilation error
BitmapData pixel manipulation functions (WIP, straight alpha, missing tests)
Convert to unsinged only when returning.
Merge.
Update BitmapData
Merge branch 'nat' of https://github.com/mozilla/shumway into nat
Mo updates
Optimize and inline premultiplication
Merge branch 'nat' of https://github.com/mozilla/shumway into nat
Update bitmaps on the GFX side, should work in the Canvas2D backend.
makes mouse wheel work again
Use renderable flags.