First round of drawPath and drawGraphicsData code.

adding some classes to mimic the behavior of these Flash APIs . There
might be no real need for them, but I think it's cool to try to make the
Starling Graphics API as complete as possible.

No support at all for GraphicStroke yet, and no support for winding at
all
Adding precisionHitTest, the option to do geometry level hit tests

Adding a code path for hit tests based on the underlying geometry. So
far, only implemented on Stroke and Fill
More precisionHitTest code

Added the precisionHitTest to Graphics as well, and corrected the hit
test function for Fill, it didnt work right for me. Inverted a test and
then things worked.
Adding precisionHitTestDistance for easier hittests

Adding a distance to make it easier to touch 1px lines etc on mobile
devices, etc.  The distance is added to the line thickness in the stroke
to determine if you touch it or not. Also added to base class bounding
box hitTests, if using precisionHitTest
Merge pull request #69 from IonSwitz/master

Adding GraphicsPath and precisionHitTests