syntax highlighting in readme

README.md

@@ -23,29 +23,31 @@ EngineYard has shared a great hands-on tutorial for deploying em-proxy: [Load Te
 
 ## Simple port forwarding proxy
 
-    Proxy.start(:host => "0.0.0.0", :port => 80, :debug => true) do |conn|
-      conn.server :srv, :host => "127.0.0.1", :port => 81
-
-      # modify / process request stream
-      conn.on_data do |data|
-        p [:on_data, data]
-        data
-      end
-
-      # modify / process response stream
-      conn.on_response do |backend, resp|
-        p [:on_response, backend, resp]
-        resp
-      end
-
-      # termination logic
-      conn.on_finish do |backend, name|
-        p [:on_finish, name]
-
-        # terminate connection (in duplex mode, you can terminate when prod is done)
-        unbind if backend == :srv
-      end
-    end
+```ruby
+Proxy.start(:host => "0.0.0.0", :port => 80, :debug => true) do |conn|
+  conn.server :srv, :host => "127.0.0.1", :port => 81
+
+  # modify / process request stream
+  conn.on_data do |data|
+    p [:on_data, data]
+    data
+  end
+
+  # modify / process response stream
+  conn.on_response do |backend, resp|
+    p [:on_response, backend, resp]
+    resp
+  end
+
+  # termination logic
+  conn.on_finish do |backend, name|
+    p [:on_finish, name]
+
+    # terminate connection (in duplex mode, you can terminate when prod is done)
+    unbind if backend == :srv
+  end
+end
+```
 
 For more examples see the /examples directory.