Merge branch 'slb' of github.com:dianping/phoenix into softbalance
Merge pull request #318 from leoliang/master

for sync source
Merge branch 'slb' of github.com:dianping/phoenix into softbalance
完成task的执行。 todo：task的状态要持久化到数据库，并且提供get方法； 界面获取task状态来显示
Merge pull request #319 from leoliang/master

agent support dynamic modify upstream
完成状态查询的方法，数据库持久化。  todo： Task容器的实现，界面的调试。
Merge pull request #320 from leoliang/master

AgentClient finished
Merge pull request #321 from atellwu/softbalance

基本完成task
Merge branch 'slb' of https://github.com/dianping/phoenix