add eden and survivor heap used info to cat client
add eden usage and survivor usage infos to heartbeat alert
refactor cat-client module ,for heartbeat part
refactor cat client's heartbeat part again
fix a bug
refactor cat-consumer module
stage StatusInfoCollector
refactor heartbeat module
remove ProductlineConfigManager
resolve conflicts
add database alert module
add database rule config module
Merge branch 'master' of https://github.com/dianping/cat
Merge branch 'master' of https://github.com/dianping/cat
refactor cat-client's StatusInfo part
resume heartbeat report part
add display policy
add display config page
rename eden to EdenUsage
refactor display policy model