0.9.6.1

1. Add management of multiclusters in web UI.
2. Merge trident part from storm-0.9.3
3. Use fastjson replace gson
4. Reorganization the code generating metrics json
5. Get jstorm version from $JSTORM_HOME/RELEASE instead of hardcode
6. Change task deserialize thread's SingleThreadDisruptorQueue to MultiThreadDisruptorQueue
7. Fix web ui display wrong number of workers in Supervisor page
8. Fix taskheart beat thread competition in accessing task map
9. Fix null pointer exception when killing worker and read worker's hearbeat object
10. Netty client connect to server only in NettyClient module.
11. Add break loop operation when netty client connection is closed
12. Fix the bug that topology warning flag present in cluster page is not consistent with error information present in topology page
13. Add recovery function when the data of task error information is corrupted
14. Fix the bug that the metric data can not be uploaded onto Alimonitor when ugrading from pre-0.9.6 to 0.9.6 and executing pkill java without restart the topologying
15. Fix the bug that zeroMq failed to receive data
16. Add interface to easily setting worker's memory
17. Set default value of topology.alimonitor.metrics.post to false
18. Only start NETTY_SERVER_DECODE_TIME for netty server
19. Keep compatible with Storm for local mode
20. Print rootId when tuple failed
21. In order to keep compatible with Storm, add submitTopologyWithProgressBar interface
22. Upgrade netty version from 3.2.7 to 3.9.0
23. Support assign topology to user-defined supervosors