Implement server with Prism.Launch
Rename directory prism/cmd to prism/prism so the executable name is prism
Make prism connects to HDFS at startup
Fix parallel.Do bug
Add example client program of prism
Decompose Prism.Launch into Prism.DeployFile and Prism.Launch
Add prism.DeployAndLaunchFile RPC
In response to comment from charlie
Merge pull request #2 from wangkuiyi/launch

Write a task manager Prism