Renaming "KeyMetadata" to "WriteParams", since that's what it is. Added DropParams, since he's different from the write.
Renaming LocalDataStore to RamDataStore. The overall design of this part has changed, and the name now reflects that.
Moving the check if I own this file into a new ILocateKeys interface, and giving IMembership a utility function to test if self is in a list of peer uids.
 * splitting out LocalWriteAction from the standard distributed WriteAction. Going to need slightly different behavior for it.