Add simple makefile

Author: timonv

Makefile

@@ -0,0 +1,12 @@
+EXAMPLES := $(wildcard examples/*.go)
+
+examples: */**.go
+	for example in $(EXAMPLES); do \
+		go run $$example; \
+	done
+
+fmt: */**.go
+	go fmt ./...
+
+test: */**.go
+	go test ./...