update readme

README.md

@@ -31,14 +31,17 @@ Status monitor: monitor the target process's status.
 Getting Started
 ---------------
 Clone this repo
+
     git clone git://github.com/onlychoice/ganger.git
+
 and run ant release, this will create two files in directory target/release: 
-auto-master-x.x.x.tar.gz for master node, auto-slave-x.x.x.tar.gz for slave node,
-use bin/ganger.sh to start the master and bin/auto-slave.sh to start the slave.
+auto-master-x.x.x.tar.gz for master node, auto-slave-x.x.x.tar.gz for slave node.
 
-See [here](https://github.com/onlychoice/ganger/blob/master/sample/xmpp.properties) 
-for a sample configuration format.
+Before doing the actual work, you need to setup a [ZooKeeper](http://zookeeper.apache.org/) 
+instance, and use the address to start master and slave nodes.
 
+See [here](https://github.com/onlychoice/ganger/blob/master/sample/xmpp.properties) 
+for a sample configuration format for a project.
 
 Document
 --------