Template updates...mostly

Got rid of doorways, Ed's right, they're better if the authors can make them. Hallways are still in for now.
Theres a ManyRooms>Export menu option to help non-unity folk package their room, it also validates.
Renamed connectionPoit to doorway
Added a 'demo room' to each template, hopefully makes a little clearer what you're allowed to do (emphasise that you don't need to fill the space