readded: the old triangle geometry shader test. remember to save useful programs and improve handling of external resources
added point to quad geometry shader. almost got a sprite shader working.
begun some work on geometry shaders cloud particles and self shadowing
cleaned up the code a little
removed some binary files from git
removed binary file from version control
added: working shadowing and cuda depth sorting and cuda with gl drawing
todo: change algorithm for computing shadowing
added git ignore to version control