Update code and README to reflect changes on the OpenWeatherMap homepage

[cmfcmf]

[robo220]

I see this is assigned to yourself. I don't mind doing this if it saves you some time.

[cmfcmf]

Thanks, would be great if you could do it!

[Kickball]

Any updates on this issue's progress?

[cmfcmf]

No sorry. I'd be happy if someone else could do this.