Update Dockerfile to use the new "golang:1.3-cross" image
Update Dockerfile to use the new "golang:1.3-cross" image

boot2docker/boot2docker-cli,tianon/boot2docker-cli,beni55/boot2docker-cli,moxiegirl/boot2docker-cli,SvenDowideit/boot2docker-cli,mattrobenolt/boot2docker-cli,nathanleclaire/boot2docker-cli,moxiegirl/boot2docker-cli,tianon/boot2docker-cli,mattrobenolt/boot2docker-cli,vmware/boot2docker-cli,SvenDowideit/boot2docker-cli,nathanleclaire/boot2docker-cli,boot2docker/boot2docker-cli,vmware/boot2docker-cli,beni55/boot2docker-cli