Rollback to old way to query Google Maps API

Sometimes it works, sometimes not .. (thanks to Access-Control-Allow-Origin)

Anyway, I can't use the Google MAP Api for Javascript since it use document.write() that breaks Packaged Apps ... -_-
-> https://code.google.com/p/gmaps-api-issues/issues/detail?id=4201

Revert 68d00e57fe4c8585ebe354eb4524612ec542e713