OS X Xcode project - Remove CCEffectGlow and add CCEffectBloom
CCEffectsTest - Fix image paths in the bloom test
CCEffectHue - Initial commit
CCEffectHue - Fill out the skeleton of the effect and add a test

It doesn't do anything yet but the foundation is all in place now.
CCEffectHue - Fill out the hue adjustment shader and update the hue test

- The GLSL implementation comes from GPUImage (the license is added in the header comments).
- The input hue adjustment follows Photoshop's convention (I think*) of ranging from -180 to 180.
- The test is updated to test various hue values from -180 to 180.

* I do not have Photoshop so I checked the documentation online.