migrate to upstream libcompose in one and a half go

vendor/github.com/fsouza/go-dockerclient/Makefile

@@ -34,6 +34,15 @@ fmt:
 fmtcheck:
 	$(foreach file,$(SRCS),gofmt -d $(file);)
 
+prepare_docker:
+	sudo stop docker
+	sudo rm -rf /var/lib/docker
+	sudo rm -f `which docker`
+	sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
+	echo "deb https://apt.dockerproject.org/repo ubuntu-trusty main" | sudo tee /etc/apt/sources.list.d/docker.list
+	sudo apt-get update
+	sudo apt-get install docker-engine=$(DOCKER_VERSION)-0~$(shell lsb_release -cs) -y --force-yes
+
 pretest: lint vet fmtcheck
 
 test: pretest