moved weatherKey and coordinates to local storage

[thefudgeishot]

Changed config.js to store certain information in local storage instead of plain text.

[lewisdoesstuff]

I think it'd be best to add another config option for this, or maybe only prompt when the key/lat/long values are undefined/null in the config.

As is, this would break weather across shared instances, requiring each user to input an API key.

It's only an OpenWeatherMap key; I don't really see a problem with it being plaintext.

[migueravila]

@thefudgeishot I love this purpose. And I think we should add it but yes. I think it should be easier to set it. I think we should double check on this. I'm sorry to not having the time for updating this project but I promise on keep updating it soon.