Mod: update readme to illustrate micro

readme.md

@@ -18,11 +18,15 @@ The server sends back messages from client. The client sends messages to the ech
 
 To run the example, start the server:
 
-    $ cd echo/tcp-echo/server/ && sh assembly/linux/test.sh && cd target/linux/echo_server-0.3.07-20161009-1632-test/ && sh bin/load.sh start
+```bash
+$ cd echo/tcp-echo/server/ && sh assembly/linux/test.sh && cd target/linux/echo_server-0.3.07-20161009-1632-test/ && sh bin/load.sh start
+```
 
 Next, start the client:
 
-    $ cd echo/tcp-echo/client/ && sh assembly/linux/test.sh && cd target/linux/echo_client-0.3.07-20161009-1634-test/ && sh bin/load.sh start
+```bash
+$ cd echo/tcp-echo/client/ && sh assembly/linux/test.sh && cd target/linux/echo_client-0.3.07-20161009-1634-test/ && sh bin/load.sh start
+```
 
 ## getty example2: ws-echo ##
 ---
@@ -33,33 +37,69 @@ The server sends back messages from client. The client sends messages to the ech
 
 To run the example, start the server:
 
-    $ cd echo/ws-echo/server/ && sh assembly/linux/test.sh && cd target/linux/echo_server-0.3.07-20161009-1632-test/ && sh bin/load.sh start
+```bash
+$ cd echo/ws-echo/server/ && sh assembly/linux/test.sh && cd target/linux/echo_server-0.3.07-20161009-1632-test/ && sh bin/load.sh start
+```
 
 Next, start the go client:
 
-    $ cd echo/ws-echo/client/ && sh assembly/linux/test.sh && cd target/linux/echo_client-0.3.07-20161009-1634-test/ && sh bin/load.sh start
+```bash
+$ cd echo/ws-echo/client/ && sh assembly/linux/test.sh && cd target/linux/echo_client-0.3.07-20161009-1634-test/ && sh bin/load.sh start
+```
 
 Or start the js client:
 
-    $ cd echo/ws-echo/js-client/ && open index.html in a internet browser(like chrome or ie or firefox etc).
+```bash
+$ cd echo/ws-echo/js-client/ && open index.html in a internet browser(like chrome or ie or firefox etc).
+```
 
 
 ## getty example3: rpc ##
 ---
 
-This example shows a simple rpc client and server.
+This example shows how to build rpc client and server.
 
 The server sends back rpc response to client. The client sends rpc requests to the rpc server and prints all messages received.
 
 To run the example on linux, start the server:
 
-    $ cd rpc/server/ && sh assembly/linux/test.sh && cd target/linux/rpc_server-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```bash
+$ cd rpc/server/ && sh assembly/linux/test.sh && cd target/linux/rpc_server-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```
 
 Next, start the go client:
 
-    $ cd rpc/client/ && sh assembly/linux/test.sh && cd target/linux/rpc_client-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```bash
+$ cd rpc/client/ && sh assembly/linux/test.sh && cd target/linux/rpc_client-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```
 
 What's more, if you run this example on mac, the server compile command should be:
 
-    $ cd rpc/server/ && sh assembly/mac/test.sh && cd target/darwin/rpc_server-0.9.2-20180806-1559-test/ && sh bin/load.sh start
-    $ cd rpc/client/ && sh assembly/mac/test.sh && cd target/darwin/rpc_client-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```bash
+$ cd rpc/server/ && sh assembly/mac/test.sh && cd target/darwin/rpc_server-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+$ cd rpc/client/ && sh assembly/mac/test.sh && cd target/darwin/rpc_client-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```
+
+## getty example4: micro ##
+---
+
+This example shows how to build micro client and server to do service registration and service discovery based on rpc.
+
+To run the example on linux, start the server:
+
+```bash
+$ cd micro/server/ && sh assembly/linux/test.sh && cd target/linux/micro_server-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```
+
+Next, start the go client:
+
+```bash
+$ cd micro/client/ && sh assembly/linux/test.sh && cd target/linux/micro_client-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```
+
+What's more, if you run this example on mac, the server compile command should be:
+
+```bash
+$ cd micro/server/ && sh assembly/mac/test.sh && cd target/darwin/micro_server-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+$ cd micro/client/ && sh assembly/mac/test.sh && cd target/darwin/micro_client-0.9.2-20180806-1559-test/ && sh bin/load.sh start
+```