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Merge branch 'master' of https://github.com/dianping/cat
Merge pull request #303 from zengwei0771/master

delete ads-1600
fix bugs and implement some new features
Merge branch 'master' of https://github.com/dianping/cat
clean code
add a file
change chart title
make view better
Merge pull request #302 from youyong205/master

fix many error
solve conflicts
delete sysout
Merge pull request #305 from jialinsun/master

fix bugs and implement some new features
network and exception monitor doc
加入了网络监控、异常监控的文档，修复了staticstic PNE bug，修正了一些丑陋的代码
Merge branch 'master' of github.com:dianping/cat
clean code, refactor code, fix possible PNE
Merge pull request #306 from jialinsun/master

network and exception monitor doc, fix staticstic PNE bug, clean ugly code
modify the code and merge document