Slave neoHub mini off neoHub

Enable neoHub mini to be slaved off of an existing neoHub so that its stats are seen as belonging to the neoHub. Effectively, the mini would just join the mesh of the neoHub, also all communications over the internet would be via the neoHub, which can have a more secure wired connection. In some cases, the home system will include elements that need both the neoHub (UFH) and mini (hot water and radiator zones) and it would be good to see them at one location rather than have to switch locations to see the elements of your heating system, especially if there are other locations too.