[mythtv] MythWeather graphics

[Brian Wente]

The NWS page states:

As required by 17 U.S.C. 403, third parties producing copyrighted works
consisting predominantly of the material appearing in NWS Web pages must
provide notice with such work(s) identifying the NWS material incorporated
and stating that such material is not subject to copyright protection.

(http://weather.gov/disclaimer.html)

But I agree we should create our own graphics, based on themes.

-- Brian