update
Merge branch 'master' of https://github.com/adyliu/zkclient
Merge branch 'master' of https://github.com/adyliu/zkclient
日志改用slf4j接口来适配，避免强依赖于log4j；
Merge pull request #2 from yangl/master

日志改用slf4j接口来适配，避免强依赖于log4j