Added debug log outputs and fixed a swap bug with pair up

Transfer, Swap, and Pair Up should now output debug messages to help bug fixing

Fixed a bug with swap where a transferred unit would teleport back its original position after a move

The massive amount of changes should come be because master hasn't been pulled into your pair up branch in a while. If that's not the case then I'll take a look at my branch and see if I messed something up.