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.
param description missing
needed for statements like if it can be null or not etc or if its not supposed to be null or is never null just to showcase some useful cases.