crOpenGL: command blocks flushing
crOpenGL: bitmap copy only if imagedata
crOpenGL: fix ocasional halts caused by crPackReadPixels
crOpenGL/wddm: multithreading fix
crOpenGL: fix 32/64bit bug
crOpenGL: add GL_ARB_pixel_buffer_object support
crOpenGL: ignore gldrawpixels with incorrect type/format
crOpenGL: tabs to spaces
crOpenGL: export to OSE