Weeeeeee!

Added ClearScreen(bool cs)
turns off/on back buffer clearing in the render engine. Who'da thought alpha channels could be so fun?

I've been dwelling on how I'm going to be able to implement OIT (order independent transparency). I'm not going to touch the rendering core until I can find a reasonable fast way to achieve this. I'm currently forcasting at least an nVidia 5700fx/ATI 9600 class gpu to fully achieve all the desired FX for ShatterStar.

I wish I could recall where I found this little ninja guy too. His art is quite remarkable. If you recognize it, drop me a note.