add build daily report feature for heartbeat module
notate a test case of heart beat builder
add query daily report feature for HeartBeatReportService
hide and show necessary infos for heartbeat history page
refactor heartbeat module's history graph part
fix a tricky bug
Merge branch 'master' of github.com:dianping/cat into HEAD
make sure heartbeat report's report type is day
trigger test again
Merge pull request #675 from youyong205/master

fix bug
Merge pull request #674 from leonindy/master

refactor heartbeat history part