u.DOut -> log.Debug

and other logging switches. I kept the u.PErr and u.POut in cli
commands, as those do need to write raw output directly.

table.go

@@ -118,7 +118,7 @@ func copyPeersFromList(target ID, peerArr peerSorterArr, peerList *list.List) pe
 		}
 		peerArr = append(peerArr, &pd)
 		if e == nil {
-			u.POut("list element was nil.\n")
+			log.Debug("list element was nil.\n")
 			return peerArr
 		}
 	}