add 2 columns in Cat.sql
change column's capacity in Cat.sql
modify the broker service
modify the default display
fix bug
Merge branch 'master' of github.com:dianping/cat
Merge branch 'master' of github.com:dianping/cat
modify the cat problem
refactor BaseAlertConfig
modify the problem url filter
fix ip query problem
refactor js error
modify the test
modify the handler
Merge pull request #327 from youyong205/master

refactor aggregation config
modify the compile error
modify the test
add default alert receivers feature
add BaseAlertConfig
merge newest code