Add example in README

README.md

@@ -1,2 +1,36 @@
-# controlmaster
-An implementation of SSH controlmaster support for Golang
+controlmaster
+-------------
+[![GoDoc](http://godoc.org/github.com/bored-engineer/controlmaster?status.svg)](http://godoc.org/github.com/bored-engineer/controlmaster)
+
+An implementation of the OpenSSH ControlMaster [protocol](https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.mux) for Golang
+
+NOTE: this relies on a _fork_ of golang.org/x/crypto/ssh with support for custom transports ([github.com/bored-engineer/ssh](https://github.com/bored-engineer/ssh))
+
+usage
+-----
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/bored-engineer/controlmaster"
+)
+
+func main() {
+	client, err := controlmaster.Dial("unix", "PATH_TO_CONTROLMASTER")
+	if err != nil {
+		log.Fatal(err)
+	}
+	session, err := client.NewSession()
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer session.Close()
+	out, err := session.CombinedOutput("id")
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Println(string(out))
+}
+```