GL_EXT_separate_shader_objects
http://www.opengl.org/registry/specs/EXT/separate_shader_objects.txt
GL_EXT_separate_shader_objects
	GL_ACTIVE_PROGRAM_EXT 0x8B8D
	void glActiveProgramEXT (GLuint program)
	GLuint glCreateShaderProgramEXT (GLenum type, const GLchar* string)
	void glUseShaderProgramEXT (GLenum type, GLuint program)