forcing a new address onto nodes added to a network in which another node with that address already exists. this was possible in case of duplicated items (creative mode e.g.)
robot label now moves smoothly with the robot; running sound for computers, robots and server racks; split sound class into server and client side
added setting for computer running noise volume
Merge branch 'master' of https://github.com/MightyPirates/OpenComputers into MC1.7

Conflicts:
	src/main/scala/li/cil/oc/client/Proxy.scala
	src/main/scala/li/cil/oc/common/tileentity/Computer.scala
	src/main/scala/li/cil/oc/common/tileentity/Rack.scala
adjusted sound stuff to the 1.7 way