Add createStorageBusMonitor API point.  

See AppliedEnergistics/Applied-Energistics-2#418

Method returns "some IMEMonitor" guaranteed to get special treatment by the storage bus.  Allows external inventories to be implemented outside of the AE2 codebase and still cooperate with the storage bus.
you are right, since its for the current Storage Bus it makes sense to apply it on items.