* add masterhaPlugin
* pomelo: 0.7.1; pomelo-masterha-plugin: 0.0.2
+ add node-zookeeper-client module; add scripts/createZKMasterNode.js
* make createZKMasterhaNode.js, startMasterhaNode.sh executable
* use pomelo-masterha-plugin@0.0.3
* use pomelo-masterha-plugin@0.0.4
* give chat/path-server a auto-restart property