Tweaked LLRenderTarget to support depth textures if FBO support is lacking.
Prefer LLRenderTarget::getFBO() over LLRenderTarget::sUseFBO when determining how to handle a specific LLRenderTarget object. (Decoupling to simplify logic without having to track a global)
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.