Display trip stops on google map

https://trello.com/c/hfU7lJrh/47-as-a-user-i-can-display-all-stops-on-google-map

* Add google api
* Delete turbo link

![screen shot 2014-11-20 at 2 36 43 pm](https://cloud.githubusercontent.com/assets/3759510/5131623/ad7dc348-70c2-11e4-99ad-3b290067ac7f.png)