Create smart shader loader

- This checks for shader code in namespace
- Then script dom elements
- Then load it via "synchronous" ajax (used for debugging)
- Will be able to clean up more code in examples
Moving things around. Adding Grunt
Add build file and update example references
Tweak Particle Renderer example for Chalkboard Effect

- Also commited some textures
- Should try moving particles with some randomness / noise for extra effect