Added new sorting system for events
modified:   app/models/event.rb
modified:   app/models/user.rb
Created helper to sort lists of events
new file:   app/helpers/events_helper.rb

Updated the views accordingly
modified:   app/views/events/_index.html.erb
modified:   app/views/users/show.html.erb

Updated factory to create future event
modified:   spec/factories/events.rb