Add simple Makefile

Signed-off-by: Robert Breker <robert.breker@citrix.com>

Makefile

@@ -0,0 +1,25 @@
+.PHONY: build
+build:
+	go get ./...
+	go build ./...
+
+.PHONY: install
+	go install ./...
+
+.PHONY: clean
+clean:
+	if [ -f docker-machine-driver-xenserver ] ; then rm docker-machine-driver-xenserver ; fi
+	for arch in 386 amd64 ; do \
+		for os in darwin linux ; do \
+			if [ -f docker-machine-driver-xenserver_$$os-$$arch ] ; then rm docker-machine-driver-xenserver_$$os-$$arch ; fi ; \
+		done \
+	done
+
+.PHONY: release
+release:
+	for arch in 386 amd64 ; do \
+		for os in darwin linux ; do \
+			GOOS=$$os GOARCH=$$arch go tool dist install pkg/runtime ; \
+			GOOS=$$os GOARCH=$$arch go build -o docker-machine-driver-xenserver_$$os-$$arch ; \
+		done \
+	done