Wind speed/direction parsing broken with aprs-python 0.7.2

[shackrat]

The aprs-python devs made a tweak to weather parsing in 0.7.2 released in July that appears to be specifically targeted to CWOP stations using the underscore (_) symbol. In aprs-python 0.7.2 parsing returns a packet with packet.weather.windSpeed and packet.weather.windDirection set as null, instead wind speed is parsed to packet.speed and wind direction to packet.course.

This behavior appears to only impact CWOP stations.

Reverting to aprs-python 0.7.1 fixes the issue and wind speed/direction are parsed correctly.

[hemna]

fwiw, I believe my PR here might be related to fixing this issue.

rossengeorgiev/aprs-python#81