map centers based on user preference upon sign-in and sign-up
if user has session (i.e. logged in) upon arrival to site, map centered based on their preference
if not logged in, and user allows browser geolocation, map auto recenters on users current location
merged master into branch
Merge branch 'master' into center_map_on_user_preference
update heroku key and app name
Merge pull request #29 from pocket-gophers-2014/travis_free_account

update heroku key and app name
cleaned up formatting in applicationController and songkick
Merge pull request #30 from pocket-gophers-2014/center_map_on_user_preference

Center map on user preference
 merged with geolocation branch