add bunch of middleware documentation

check the example https://cdn.rawgit.com/APItools/monitor/f3cdf18dc0b9e1dcd45d398cdad334324d999752/doc/index.html

or here you have a screenshot: https://cloud.githubusercontent.com/assets/154571/5047874/a1e2a538-6c19-11e4-9cdb-664feecd53cc.png