Merge pull request #9 from benja83/master

Added factory girl and finished test of locations controller
Added user authentication
Added login and sign-up pages
added migration to add a the user_id in locations
Added before action to locations controller
Merge branch 'master' of https://github.com/buzzlightyear182/Meet-me-app
Added users factories, changed location and user model tests
Added user_id when an user create a locations