[aprssig] PCSat2 telemetry

[Steve Dimse]

I've added a new parameter to the tele, tele1, and tele2 cgis in  
order to support the PCSat2 telemetry format. Previously, using these  
cgis with PCSat resulted in garbage, because PCSat sends 4 different  
telemetry values, specified by the cycle, 00, 01, 10, and 11. In  
essence, the plot consisted of all 4 telemetry sets overlapped, and  
looked pretty ugly:

http://www.findu.com/cgi-bin/tele2.cgi?call=pc2iss

Now you can specify the cycle, which will filter out data from the  
other cycles:

http://www.findu.com/cgi-bin/tele2.cgi?call=pc2iss&cycle=10

Eventually I'll get around to producing URLs for each of the  
parameters for the plot1 cgi including labels and equation variables.  
It is something anyone could do, and it would be a big help if  
someone needs a quick project...

Steve K4HG