GPU Particles

NOTE: As seen here https://github.com/amulware/genericgamedev-gpu-particles/tree/cpu-gpu-comparison/GenericGamedev.Pixelation
The CPUSimpleParticles.cs, AlmostGPUParticles.cs and GPUParticles.cs demonstrate how you can completely render/update on the GPU.

List of things to do for this:
- Need to add a call from app to particlesystem or something else
- Maybe add renderers or entities that can iterate through all the pool particles and render and use the camera and add some special effects i guess
- I need to provide minimal implementation in the shaders (take the matrices and multiply it with the vertex location)

SEE THIIIS
http://stackoverflow.com/questions/8608844/resizing-point-sprites-based-on-distance-from-the-camera he uses a sampler2darray as a uniform, would it be possible that way?

**COMPUTE SHADERS**