weather: forecast up to 10 days

This service needs api key. For now I put it straightly into the url
It will need to be replaced, like in perl with {{ENV_APIKEY}} , but not sure if python supports this. Gonna look at it deeply.

Signed-off-by: Adrian Matejov <a.matejov@centrum.sk>
@Adman I still believe that there needs to be a python Wunderground API. If there is none this would be a good time to create one. This just doesn't belong here.

But I can still live with it probably.