Merge pull request #321 from atellwu/softbalance

基本完成task
add ppe env
Merge branch 'slb' of https://github.com/dianping/phoenix
Merge pull request #322 from leoliang/master

add ppe env support
bugfix
Merge pull request #323 from leoliang/master

bugfix
Merge branch 'slb' of github.com:dianping/phoenix into softbalance