November2013 Hydroponics improvements

DONE	Leather gloves now have heat protection like black gloves (to allow removing lights bulbs/tubes)
DONE	Plants require 4 light, mushrooms only 2
DONE	Harvesting should report how many items were harvested (whether plantbag is used or not)
DONE	Plantbag should have a mode to only pick up one kind of plant at a time.  Trash and ore bags too.
DONE	1 unit of mutagen should cause non-species mutations.  (Radium too)
DONE	Uranium should be like radium but even weaker