Possibly resolve some screen/terminal related glitches.
Made the animation on the side of chargers only visible when there's actually enough power to charge.
Merge branch 'master' of github.com:MightyPirates/OpenComputers into MC1.7

Conflicts:
	src/main/scala/li/cil/oc/client/PacketHandler.scala
	src/main/scala/li/cil/oc/common/tileentity/Charger.scala