Add proxy example (#141) (#175)

* cleanup

* add proxy example

examples/proxy/main.go

@@ -0,0 +1,14 @@
+package main
+
+// This example shows how to
+// 1. read an existing stream from an external server or camera, with a client
+// 2. create a server that allow to proxy that stream
+
+func main() {
+	// allocate the client
+	c := newClient()
+
+	// allocate the server.
+	// give server access to the method client.getStream().
+	newServer(c.getStream)
+}