CM:

CM:

I've updated the WeatherDatabase to be able to use only the n closest
stations. This can speed up the initalization dramatically.

To take a benefit from that you need:

- http://129.13.102.67/out/flight/current.txt.gz in
  FG_ROOT/weather/current.txt.gz
- --prop:/environment/weather/working-type=internet
- --prop:/environment/weather/max-stations=what_ever_you_want

The WeatherCM stuff now publishes its data in the property system.

    /environment/weather/wind-north-mps
    /environment/weather/wind-east-mps
    /environment/weather/wind-up-mps
    /environment/weather/temperature-K
    /environment/weather/air-pressure-Pa
    /environment/weather/vapor-pressure-Pa
    /environment/weather/air-density

are the new properties.