added particle system to core
init
merged shadowMap
cleanup
Simplified shadow frag
init effects commit
Cleaned up Cheng's code.  Ready to start Gaussian Blur
twobuffersforblur
starting blur
gauss blur working
fairydust
added final shaders
gaussian and final pass working
downsample and slider
downsampled depth
best DOF yet and gaussian bug fixed
DOF WORKING
everything working
shadow maps working
experiments with light class