features a square wave mode.
Added proportional beep duration based on the RSSI as well.
Now reading the current radiosonde frequency from the
battery backed RAM instead starting with the same frequency
all the time.
Added the Vaisala RS41 data packet decoding.
Changed the default freq from 402.0 to 402.7 Mhz, since it is more popular freq.
Lowered the frequency stepping, so it is easier to fine-tune the exact freq center, if needed.
Sonde's Serial ID is passed into the VIEW MAP, so now the sonde is labelled on the map.
