Switch OpenWeatherMap API URLs to HTTPS

[SkewedZeppelin]

See http://openweathermap.org/news/post/ssl-free-and-startup-accounts

[Sparker0i]

Hey there,

Since the last few builds, travis has been giving me error in building. I'm not able to verify what the error is, so meanwhile can you post the screenshot of the app working on your phone (with this commit), and also attach the debug apk?

[SkewedZeppelin]

@Sparker0i I've not actually compiled this as I've made this commit to multiple weather apps, but I can confirm that HTTPS API access does indeed work.

And I've added a commit to Fix your Travis builds :)

[Sparker0i]

The build has failed. I cannot accept this ATM. Do consider sending another PR without Travis part

[SkewedZeppelin]

That Travis commit does fix one issue, it seems there is another issue however. I've removed it.

Edit: Even though I removed it, GitHub hasn't seemed to update the PR.