Merge pull request #233 from ni-ze/newWorld-4

[ISSUE #234]Add quick start

README.md

@@ -81,12 +81,15 @@ The broker[broker-a, 192.169.1.2:10911] boot success...
 ```
 
 **3) Build stream processing application**
+
 * create topic in RocketMQ before start the stream processing.
 ```shell
 sh bin/mqadmin updateTopic -c DefaultCluster -t sourceTopic -r 8 -w 8 -n 127.0.0.1:9876
 ```
-NOTE: the default clusterName is DefaultCluster in this quick-start doc, changes with your RocketMQ cluster.
+
+ NOTE: the default clusterName is DefaultCluster in this quick-start doc, changes it with your RocketMQ cluster.
 
+* add your stream processing code, follow is the example. more example is [here](./example/src/main/java/org/apache/rocketmq/streams/examples).
 ```java
 public static void main(String[] args) {
  StreamBuilder builder = new StreamBuilder("wordCount");