Merge pull request #32 from atungare/dev

Fix logout function to clear session and not log out from facebook using...
Render facebook checkins as map markers
Merge pull request #33 from vreddy18/master

Render facebook checkins as map markers
Clean up code in map.js
Re-factor to include latest version of mapbox source files
Merge pull request #34 from vreddy18/master

Code clean up; include latest version of mapbox source files