CCEffectsTest - Add a repeated action sequence to change the refraction effect's normal map
CCEffectRefraction - Combine the sprite's color and main texture with the refracted environment texture

For now the color, main texture, and refracted environment are multiplied together. This is based on a couple
glass shader examples that I've found. We can adjust this if necessary though.

Also add color textures for the refraction test that match the normal maps.
CCEffects - Fix the "some properties don't return the same value that was set" problem

I half fixed this a little while ago but introducing internal properties that store the conditioned
versions of the public properties. The problem is that in overriding the setters for the public
properties I wasn't actually setting the public ivar. Dumb.
CCEffects - Add default initializers to the headers for all effects