switch to docker based travis infrastructure
switch to docker based travis infrastructure
liip/LiipImagineBundle,robfrawley/LiipImagineBundle,prolixtechnikos/LiipImagineBundle,prolixtechnikos/LiipImagineBundle,prolixtechnikos/LiipImagineBundle,liip/LiipImagineBundle,robfrawley/LiipImagineBundle