Merge pull request #1301 from tschneidereit/nat

Fixes to make tsc 1.0 happier
Link up native functions better.
Merge branch 'nat' of https://github.com/mozilla/shumway into nat
Fix gfx TS1 bugs.
Fix options references that conflict with TS 1.0.
Export scaling grid
Add some stage setters.
Merge branch 'nat' of https://github.com/mozilla/shumway into nat
Misc fixes.
Loader & mouse updates
Invalidate parent if graphics change
Return parent as default interactive ancestor
Define default interactive ancestor
Serialize color transforms.
Merge.
override set alpha in Stage to throw exception
Very rough implementation of passing shape data from Graphics objects to the rendering backend