Fixes mix-it/linkit#26:  reset Member.ticketingRegistered flag to false (no one already bought its mixit14 ticket)
Getting ready for new current event "mixit14".
navbar: Mix-IT 2013 before 2012 and 2011.
Merge pull request #30 from clacote/bootstrap3-reset-DB-for-new-event

Getting ready for `ConferenceEvent.mixit14`