- Implemented defpos for multiple motors

- Implemented automatic backup on parameter change
- Implemented silent restore
- Cleaned a couple of unused flags from connection object

tdchm.c

@@ -419,6 +419,7 @@ static int TDCContinue(pHistDriver self, SConnection *pCon){
 /*=======================================================================*/
 static int TDCFree(pHistDriver self){
   free(self->pPriv);
+  return 1;
 }
 /*======================================================================*/
 static int TDCSetHistogram(pHistDriver self, SConnection *pCon,