add Metric to Cat API
Merge pull request #21 from unidal/biz

add Metric to Cat API
modify the CONFLICT
Merge pull request #22 from youyong205/biz

resolved the conflict
modify the cat core bug and add bussniess table
Merge branch 'master' of github.com:dianping/cat into biz
add metric report for business monitor
modify the report service NPE
add the default start end time to report in report service
add the metric url
modify the cat metric table name(group is not correct!)
fix business dao bug
delete the sysout
Merge pull request #23 from youyong205/biz

Biz metric analyzer
Merge branch 'biz' of github.com:dianping/cat into biz
modify the cat all test case
metric report add conversion rate graph
modify the metric graph
fix the performance issure
performance modify