Merge pull request #607 from youyong205/master

modify the menu
show domain name on metric page when alerts occur
Merge branch 'master' of https://github.com/dianping/cat
fix bug
Merge branch 'master' of https://github.com/dianping/cat
Merge pull request #609 from jialinsun/master

fix bug
Merge pull request #608 from leonindy/master

show domain name on metric page when alerts occur