LOOM-1545: WIP texture smoothing
LOOM-1545: Adding texture smoothing example
LOOM-1545: Texture Example improvements
LOOM-1545: support nearest neighbor and bilinear for now
LOOM-1545: resurrecting GL mipmapping (with a superior method)
LOOM-1545: mip mapping working on iOS and Android
LOOM-1545: Generate mip maps on Direct3D9
LOOM-1545: Make a note about DDS and other formats that supply their own mips (we don't use DDS atm)
LOOM-1545: Docs and cleanups