Using face deformer with transparent PNG image

[smukkejohan]

I guess this is a feature request to enable the face deformer to work with a png with transparency as a mask. I was looking through the code and couldn't quite figure why it is not working as it is parsing the texture on as RGBA as far as I can see.

Update: read up on the differences between webgl and opengl here http://www.html5rocks.com/en/tutorials/webgl/webgl_fundamentals/#toc-webglalpha and proposed a fix. I tested that it works with both transparent png's and with all of the existing images in the face mask example.