Re-structured some shader loading/unloading handling.
These changes are pretty experimental. I'll be holding off of tweaking the paramater managers(among other things) until I know if this stuff is working correctly.
Fixed avatar shadows on AMD (and any other sane GLSL compiler)
Fixed windows compile:
-curl version was updated after running develop.py. Not sure if applicable to linux/darwin
-new llqtwebkit version on windows, since the old url is now invalid.