Updated PixiShader to use standard uniform naming conventions (1f, 2f, 2fv, etc). Added support for multiple sampler2D calls, allowing multi-texture shaders. Added support for Linear, Repeat, Nearest, Audio and Keyboard textures. Updated all the examples to use the new uniform naming convention. Updated Gruntfile to use the renamed GrayFilter and fixed indexAll in Example 15 to use the GrayFilter as well.

Added 2 filters fix filter bug ...

Fixed filter bug where filters not wotkring on transparent renderer
Added CrossHatchFilter
Added RGBSplitFilter
Updated Example 15