support for 2D shadow casters

Added support for 2D shadow casters.

*DANGER* Shaders in CanvasItem CHANGED, if you are using shader in a
CanvasItem and pull this, you will lose them. Shaders now work through a
2D material system similar to 3D. If you don't want to lose the 2D
shader code, save the shader as a .shd, then create a material in
CanvasItem and re-assign the shader.
This commit is contained in:
Juan Linietsky
2015-03-02 00:54:10 -03:00
parent 0e732637d0
commit a1f715a4da
43 changed files with 2586 additions and 271 deletions

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