GL_EXT_timer_query
http://www.nvidia.com/dev_content/nvopenglspecs/GL_EXT_timer_query.txt
	GL_TIME_ELAPSED_EXT 0x88BF
	void glGetQueryObjecti64vEXT (GLuint id, GLenum pname, GLint64EXT *params)
	void glGetQueryObjectui64vEXT (GLuint id, GLenum pname, GLuint64EXT *params)