amend buildExtensionGraph method
amend convert to delta method in heartbeat alert
check whether data exists in heartbeat alert
Merge branch 'master' of github.com:dianping/cat
Merge pull request #689 from leonindy/master

amend serval methods in heartbeat module
Merge pull request #690 from jialinsun/master

modify css
fix heartbeat alert
Merge pull request #691 from youyong205/master

fix heartbeat alert
Merge pull request #692 from jialinsun/master

optimize user experience
reduce unnecessary method in DisplayPolicyManager
refactor heartbeat alert's query configs method
Merge branch 'master' of github.com:dianping/cat
modify the jsp
modify the jsp
modify the jsp
modify the jsp
modify the home index
modify the body
modify the css
stage some changes