don't generate upstream while this upstream not used
remove pools from vs, so that pools can be share by multi-vs
Merge pull request #286 from leoliang/master

dont' generate upstream segment while this upstream not used & pools can be share by multi-vs
refactor
Merge pull request #287 from leoliang/master

refactor model name & package
Merge branch 'slb' of https://github.com/dianping/phoenix into softbalance
修改编译错误。
push for sync