Upgrade travis to 1.7.19
Upgrade travis to 1.7.19

idibon/warbler,ctreatma/warbler,fedenusy/warbler,idibon/warbler,ctreatma/warbler,ctreatma/warbler,fedenusy/warbler,idibon/warbler,ctreatma/warbler,fedenusy/warbler,fedenusy/warbler,idibon/warbler