Only run Travis on the master branch.
Only run Travis on the master branch.

jeffreybaird/oga,ttasanen/oga,jeffreybaird/oga,ttasanen/oga,ttasanen/oga,dfockler/oga,altmetric/oga,altmetric/oga,jeffreybaird/oga,dfockler/oga,YorickPeterse/oga,altmetric/oga,YorickPeterse/oga,dfockler/oga,YorickPeterse/oga,YorickPeterse/oga,YorickPeterse/oga,jeffreybaird/oga,dfockler/oga,ttasanen/oga,altmetric/oga,altmetric/oga,jeffreybaird/oga,dfockler/oga,ttasanen/oga