[HTML5] BlendMode makes it impossible to compile

The newest version of NME (3.3.2) causes a compilation error in html5. The version of jeash that was integrated with NME doesn't seem to match the latest on haxelib so there are discrepancies. For example BlendMode should be defined as an enum instead of a class with static strings (like neko). The issue is that bitmapData.draw expects a BlendMode instance and instead gets a string. See my example below.

myBitmap.draw(bitmapToDraw, null, null, BlendMode.MULTIPLY);

Honestly I don't care if you switch the draw function to accept a string or enum but it should match. This is actually the same problem in neash, just the other way around. Neash expects a string in the draw method but BlendMode is defined as an enum.

Thanks for the great framework!