Merge pull request #78 from youyong205/biz

Biz
Merge pull request #83 from youyong205/biz

Biz
Merge pull request #86 from youyong205/biz

Biz
modify the cat metric problem
Merge pull request #87 from ainilife/biz-abtest

Biz abtest
meger abtest
modify the jsp page
modify the jsp
modify the metric config
Merge pull request #88 from youyong205/biz

metric report
Merge branch 'biz' of https://github.com/dianping/cat into biz-abtest
add a abtest codec