changed from rvmrc to .ruby-version
update Gemfile's from rails 3.2.8 to 4.0.1
removed attr_accessible from photo_file and photo_file_sharing
removed attr_accessible from photo_sharing and photo_file_sharing_controller
removed attr_accessible since it is deprecated from rails 4
removed attr_accessible since it is deprecated from rails 4
removed configuration items that were depracted on rails4