MAJOR: Introduce knowndbs.list for mark already analyzed database file from remote clients (write at the end of DownOperation, read in LsRemoteStatus operation), write tests (ThreeClientsOneLoser)  for scenario with of a client that does not clean up its conflicts (other clients must ignore its databases); MINOR: Introduce Down/UpResultCode to mark success/failure in Down/UpOperations
MAJOR: Fixed new local version after dirty issue (lastDirty+1), moved UpOperation.saveLocalDatabase AFTER multichunk upload; MINOR: Import cleanup according to eclipse recommendations