Committing initial code that supports the generation of an APRS unit/label
string. This was testing by sending telemetry labels to APRS-IS and
checked on aprs.fi. Not cleaned up yet.
Modeled off of the PositionReport class, I created a TelemetryReport and
used similar serialization to create a working packet that was uploaded to
aprs.fi for testing.
Bryce Salmi
Rossen Georgiev