[mythtv-users] New wunderground weather scripts for 0.26

[Gavin Hurlbut]

Wunderground has obsoleted the API we were previously using for
weather maps and for forecasts.  They have replaced it with a much
sleeker REST API, but however, this came at a "cost".  It now requires
the use of API keys.

NOTE:  All users who wish to use the wunderground weather source in
0.26 and beyond **MUST** sign up for an API key, which should be put
into either
$HOME/.mythtv/MythWeather/wunderground.key
or
$MYTHCONFDIR/MythWeather/wunderground.key

One can sign up for an API key at:
http://www.wunderground.com/weather/api/

You will need your key to be at the
"Cumulus Developer" level for static maps or weather forecasts and
"Anvil Developer" level for animated maps.

Since this has required coding and theme changes (adding the logo),
this will not likely ever be backported to 0.25 or earlier.