fix app frontend bug
Merge branch 'master' of https://github.com/dianping/cat
Merge branch 'master' of https://github.com/dianping/cat
fix update table capacity bug
add Highload model
remove highload table
add tests
refactor highload back module
add HighloadReportService
amend highload module's frontend part
amend some bugs
merge newest code, resolve conflicts
Merge pull request #598 from leonindy/master

refactor highload module, enhance overload updaters' logic