1) !?: RGB value of (0,0,0) turns light off.
2) ?!: Setting a light that is off turns it on (error otherwise).
3) Requesting a object from an object pool now returns the object.
4) RGB validation now works with string values.
5) Original cycler renamed to test_scene_cycler.
6) New cycler created that cycles through RGB colors.
7) test_set code now allows direct RGB setting (no longer goes through
	xy).