Vanity callsign generator for General Class callsigns
This callsign generator randomly generates valid and unregistered 1x3 and 2x3 callsigns.
To use, supply a url where a list of callsigns in the Zip-codeStateCallsign format can be found.
To run: python3 genClass_generator.py http://url.of.callsigns/callsigns.txt