[aprssig] Beta-quality APRS device statistics

[Bill V WA7NWP]

Don't forget WE7U's Client Usage charts which have been running for years...

  http://wetnet.net/~we7u/usage.html

>> I've re-ran the statistics now. Detections for PSKmail, APRS Messenger,
>> BeeLine GPS and APRSIS32 were added, and the detection rate went from 85.4
>> to 85.6.
>>
>> The numbers for less popular versions are not very big, but as software
>> authors, please notice that these numbers are for a single week. There are
>> plenty of users who are using your software, just not every week, but every
>> month or two. I can re-run the numbers over a month of data later (I don't
>> have the raw packets, needed for this analysis, collected for such a long
>> period - yet).