moved bin.py to bin/mediator as the binary that user should run. lots of preparation for tying into setuptools chain. added some preflight checks to resolve settings file location, added some by-default directories that mediator needs...probably needs to be rethought, but it is what you are getting for now. those files and folders are triggered by a new command line argument -c or --configure, using argparse. removed some magic numbers, will probably continue to change as the best method reveals itself over time.
removing dev-specific paths and associated keys. the removed keys will be added with `mediator -c`. filename patterns for broadcast tweaked just a bit.