user should now provide his personal API key

Conflicts resolved on rebase with master:
	addon.xml
	resources/lib/wunderground.py
[fix] regression double degree on 36 hour

reintroduced after a2c10e704ffb5ab21e8146dc38541bbedd81506f
[fix] WAIK = user input not -1 char else is invalid

dont strip any characters from user api key else is invalid.
[fix] location input in settings never become usable

with this you can actually input new locations
[fix] no base64 else user needs to encode api key

ensure user entered api key is as user gets it from weather underground.
Else user needs to base64 encode the api key before entering it in the
addon.
bump addon version and update changelog