tag support
Merge branch 'master' of https://github.com/dianping/phoenix
Merge pull request #275 from leoliang/master

tag support is excellent
merge
Merge branch 'master' of https://github.com/dianping/phoenix into softbalance

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