Optimized version

Features

1. Change the job id generation rule
2. Optimize master which can handle long-tail effect
3. Use multi-thread to optimize the shuffle service
4. Provide block mode for client, use return value to check if job is succeeded
5. Pull up reduce tasks in advance
6. Fix a few bugs

FATAL Bugs Fixed

Fixed a few fatal bugs in client and some bugs in master

First version

Features:

1. submit/kill/update a streaming/bistreaming map-only/map-reduce job
2. check the status of the job and every tasks
3. c++ sdk interface and command line client