Change setup process from website to config file

[adenoz]

At the moment, users need to grab the geohash from the BOM website. However it would be better, and it is possible, do simply write in your location in the config.toml file that use an API call to grab the geohash. This would be much simpler and more streamlined from a user perspective.

We could still have fallback where if the program is not running (and of course have good error messages why), suggest checking location works at the bom weather site to confirm it works there.