Merge pull request #261 from youyong205/biz

Biz
add the alert config
modify the test
modify the alertconfig
modify the cat metric alert
modify the send email
modify the cat alert config
fix the event graph problem
modify the cat email send error
fix event bug
fix graph report bug
refactor metric
modify the metric analyzer from Compatible
modify the cat metric order bug
mk metric alert configration
modify the alert title
modify the document
modify the sms function
Merge branch 'biz' of github.com:dianping/cat into biz
modify the cat metric problem