Add remapping feature to asebamedulla

Created by: stephanemagnenat

It would be nice if two targets with the same id/name (for instance two Thymios) could be used together in the same network with medulla, using a mechanism similar to the identifier remapping in switch. In addition to switch, we would need to remap the node name also, as the latter is used to identify targets through the D-Bus interface. There is a forum post related to this question: https://www.thymio.org/forum/t-1179135/two-thymios-connected-to-one-pc-with-python