* Removed need for redis, instead uses umsgpack and flat files similar to reticulum and nomad net
* Uses internal queue for the message queue
* Announcements are tracked in file rather than redis
* Uses its own config folder `nomadmb`, code inspired by NomadNet
* Script will now prune the message board to 'max_messages' to ensure the board doesn't get too long, default set to 20
* adjusted indents to match in all functions
* Created announce_check function which will check if need to rebroadcast announcement (hard coded to every 30 minutes)
* Using os.getcwd now can get current directory so doesn't need hardcoded dir for storage/identity
* Reduced RNS.log printout
* Adjustable redis database
