Use named capture groups for parsing.
Regular expressions for receiver and aircraft beacons are from ruby ogn-client.
The separated regular expressions for parsing of aircraft beacons were
concatenated to harmonize with other ogn clients (at zero costs,
currently all packets stick to the common token sequence).
regexp for receiver and aircraft beacons:
Copyright (c) 2015 Sven Schwyn; licensed under The MIT License
Fabian P. Schmidt