add find prev tag function & add status support for pheonix-agent
tag folder move to yyyyMMdd sub folder
add tag removal & find latest tag function
refactor & add deploy model
Merge pull request #280 from leoliang/master

add tag support function & phoenix-agent status support & tag folder move to yyyyMMdd sub folder & refactor
Merge branch 'slb' of https://github.com/dianping/phoenix into
softbalance

Conflicts:
	phoenix-load-balancer/pom.xml
	phoenix-load-balancer/src/main/java/com/dianping/phoenix/lb/dao/impl/LocalFileModelStoreImpl.java