Some logging messages were still being issued when portals/debug/logging was false. This could be annoying in games that stream in parts of levels and repeatedly call `rooms_convert()`.
This PR allows all but essential logging to be disabled.
For this reason, this PR binds the mesh merging functionality.
It also slightly modifies the calling from RoomManager to use a Vector of Node *, in order to allow binding of the function. - lawnjelly - cf1b3fdd55