add json buildr and parser for rule
add fronted json test
fix née when metricItemConfig is missing
change business rule config page
make some modifications
add network rule modification module
modify rule config page
add system config modification page
solve conflicts
reimport BaseRuleConfigManager
Merge pull request #509 from leonindy/master

refactor rule config page
Merge branch 'master' of github.com:dianping/cat
modify success ratio unit
modify success ration unit
Merge branch 'master' of https://github.com/jialinsun/cat
revert rule modify
Merge pull request #510 from jialinsun/master

modify success ratio unit
Merge branch 'master' of github.com:dianping/cat