Switched getJson to $.ajax with jsonp to avoid CORS errors

[SaFrMo]

Thanks for this repo, it's super useful with the deprecation of the Yahoo API! I was running into CORS errors so I switched $.getJson to $.ajax with a jsonp data type as a fix - thought this might be helpful for others. Thanks again!

[bgallagh3r]

This would solve a lot of issues. +1

[morgant]

@SaFrMo Does this method work with specifying the API Key directly or does one still have to use a proxy? Using your fork, my success callback is called, but passed undefined.