adds google places library to application layout

provides support for search and autocomplete based on text strings

https://developers.google.com/maps/documentation/javascript/places#loading_the_library
adds google places autocomplete integration

autocomplete using the google places api can be added to an input by
adding the `data-google-places` attribute
adds data-google-places to address input
Merge pull request #109 from mockra/google-places-autocomplete

Google places autocomplete