…ater.

…Role synchronous.

…lt. Setting it false will use the old code to do serial initialization.

Also ensure that ports are initialized first.
Needs testing on several systems before merging.

… clear the used vectors at the end of the function.

I am not quite sure if this is needed, but after this change, I no longer
saw an exception on Micro-Manager shutdown, so it may be helpful.

…alize all other devices, ignoring more exceptions if they occur, then rethrow first exception.