WU API replacement

Updated Jun 29, 2018

Since weather underground no longer provides free API keys, we need a new provider.

For PiClock, I'm going to do a very simple simple plugin method to replace the api for both the radar and the current and forecast.

This means there will need to be a standard format for the plugin return values. Initially I'm sure this will be similar if not the same as the WU api return format.

Radar paints itself, so it is fairly self contained.


Updated Apr 18, 2017

Migrate PiClock to PiClock² using general direction outlined in Issue #54