Travis: Initiating build for commit '0a0a0d2cdef310e98636ef1b68fc4f9d4108b235' on branch 'campaign_change_new_visit': Refs #2624, add INI config options that will force a new visit if campaign/website referrer information changes between actions. Includes new tracker hook shouldForceNewVisit that dimensions can use to force a new visit during tracking. Also includes light refactoring to referrer dimensions. Testless.