Use url_for helper to construct locations urls
  * Replaced hardcoded paths with Rails routes generated ones
  * Links should "just work" now on any deploy of the rails app
Add the javascript for Facebook sharing to assests
  * Allows a user to share a Breathe Cam view to Facebook
  * The current view's share link is used for the Facebook link
  * The current view's thumbnail is used for the Facebook picture
Include fbshare-bundle.js on location view page
  * Call fbShare() to initiate Facebook dialog