Use Google Places Autocomplete APIs to support users looking up different geo locations during hub searches

"All of - Anytown, USA" task:  Added the ability for a user to search for a city, county, state or country when searching for a hub using the Google Places Autocomplete APIs.  This change requires a GOOGLE_API_KEY to be set in the environment variables of the server the spoken vote application is running on.   For further information on obtaining a key for this API go to : https://developers.google.com/places/documentation/autocomplete#place_autocomplete_request