Bluez 5

[teamclouday]

Found a bluez-rfcomm-example repo for Bluez 5 rfcomm server/client example. Whoever created the repo is a hero!!!
Only concern is that Bluez 5 may also require root permission for registration, not sure if there is a way around it.

For me in the future: read and try to implement for linux version.

Also might be worthwhile to update the repo (i.e. a complete refactor of PC code). I would prefer to compile either platform in single cmake file and share most of the code.
And ofc, update the UI as well 🤗