0.9.6 release

1. Update UI
   • Display the metrics information of task and worker
   • warning flag when errors occur for a topology
   • Add link from supervisor page to task page
2. Send metrics data to Alimonitor
3. Add metrics interface for user
4. Add task.cleanup.timeout.sec setting to let task gently cleanup
5. Set the worker's log name as topologyName-worker-port.log
6. Add setting "worker.redirect.output.file", so worker can redirect System.out/System.err to one setting file
7. Add storm list command
8. Add closing channel check in netty client to avoid double close
9. Add connecting check in netty client to avoid connecting one server twice at one time