Includes a re-factoring of the WSPRNet class, particularly to handle
direct spot posts as well as via a file from wsprd. Switched from GET
http request method to POST method.
FST4W spots post the same information a WSPR spots except the drift
field is always zero (FST4W has no drift compensation, so no drift
figure is calculated by the decoder), and the mode field reflects the
T/R period in minutes. This means FST4W-120A will be similar to
WSPR-2, an FST4W-900 will be similar to WSPR-15. I don't see any way
to view the mode field on either the new or old database format
queries on WSPRnet, so it is hard to tell if that field is actually
stored.
