0.5 22oct2014
* fixed windchill and heatindex calculations for databases with US units

0.4 21oct2014
* use UTC instead of local time

0.3 20oct2014
* disable thw until we determine a proper algorithm for it

0.2 19oct2014
* added fields for all weewx variables in default schema
* added derived variables

0.1 15oct2014
* initial release as packaged weewx extension
