Add country selector for weather

[Jiab77]

Hello, It would be nice to have a country selector instead of relying on location service to get it. I most of the time disable every location service everywhere but I'm okay to define it manually for some apps.

[casasfernando]

@Jiab77 I forked @PlugaruT 's project to https://github.com/casasfernando/wingpanel-indicator-weather as a dedicated weather indicator, did some modifications and add a few features (including manual location setting). You can also find a Debian package in the release page for easy installation.

I hope you find it useful, and many thanks for @PlugaruT since his code was a great base to work on.