修复bug，添加网络监控变红标题
Agent 修改
Merge pull request #366 from jialinsun/master

修复bug，添加网络监控变红标题
Merge pull request #367 from youyong205/master

fix bug
重构Agent， monitor handler代码
Merge pull request #368 from jialinsun/master

重构Agent， monitor handler代码
Merge branch 'master' of github.com:dianping/cat