Removed DCPServer class
Renamed DCPServerBackend to DCPServer.
Moved files dcpserverbackend.{cpp,h} to dcpserver.{cpp,h}. Modified includes.
Renamed DCPServerBackendCentral to DCPServerCentral.
Moved dcpserverbackendcentral.{cpp,h} to dcpservercentral.{cpp,h}. Modified includes.
Rename DCPServerBackendRemote to DCPServerCommand. Renamed DCPServerBackendRemoteStatus to DCPServerCommandStatus.
Moved dcpserverbackendremote.{cpp,h} to dcpservercommand.{cpp,h}. Modified includes.