adding a constraint to avoid users ending up attending events more than once
renaming the Generator class to DataGenerator for PHP 5.5 compatibility
add duplicate detection for users attending events
making the user/event attending checks better
moving patch number along to keep pace with master
Merge branch 'master' of GitHub:joindin/joindin-api into event-user-constraint
Merge branch 'dbgen-dupes' into event-user-constraint
Merge branch 'lornajane-event-user-constraint'