Add glide.yaml and vendor deps

vendor/github.com/containers/image/Makefile

@@ -0,0 +1,58 @@
+.PHONY: all deps test validate lint
+
+# Which github repostiory and branch to use for testing with skopeo
+SKOPEO_REPO = projectatomic/skopeo
+SKOPEO_BRANCH = master
+# Set SUDO=sudo to run container integration tests using sudo.
+SUDO =
+
+all: deps .gitvalidation test validate
+
+deps:
+	go get -t ./...
+	go get -u github.com/golang/lint/golint
+	go get github.com/vbatts/git-validation
+
+test:
+	@go test -cover ./...
+
+# This is not run as part of (make all), but Travis CI does run this.
+# Demonstarting a working version of skopeo (possibly with modified SKOPEO_REPO/SKOPEO_BRANCH, e.g.
+#    make test-skopeo SKOPEO_REPO=runcom/skopeo-1 SKOPEO_BRANCH=oci-3 SUDO=sudo
+# ) is a requirement before merging; note that Travis will only test
+# the master branch of the upstream repo.
+test-skopeo:
+	@echo === Testing skopeo build
+	@export GOPATH=$$(mktemp -d) && \
+		skopeo_path=$${GOPATH}/src/github.com/projectatomic/skopeo && \
+		vendor_path=$${skopeo_path}/vendor/github.com/containers/image && \
+		git clone -b $(SKOPEO_BRANCH) https://github.com/$(SKOPEO_REPO) $${skopeo_path} && \
+		rm -rf $${vendor_path} && cp -r . $${vendor_path} && \
+		cd $${skopeo_path} && \
+		make binary-local test-all-local && \
+		$(SUDO) make check && \
+		rm -rf $${skopeo_path}
+
+validate: lint
+	@go vet ./...
+	@test -z "$$(gofmt -s -l . | tee /dev/stderr)"
+
+lint:
+	@out="$$(golint ./...)"; \
+	if [ -n "$$(golint ./...)" ]; then \
+		echo "$$out"; \
+		exit 1; \
+	fi
+
+.PHONY: .gitvalidation
+
+EPOCH_TEST_COMMIT ?= e68e0e1110e64f906f9b482e548f17d73e02e6b1
+
+# When this is running in travis, it will only check the travis commit range
+.gitvalidation:
+	@which git-validation > /dev/null 2>/dev/null || (echo "ERROR: git-validation not found. Consider 'make deps' target" && false)
+ifeq ($(TRAVIS),true)
+	@git-validation -q -run DCO,short-subject,dangling-whitespace
+else
+	@git-validation -q -run DCO,short-subject,dangling-whitespace -range $(EPOCH_TEST_COMMIT)..HEAD
+endif