support ep.done(function (err, data1, data2) {}), callback with more than one data arguments
Merge pull request #9 from fengmk2/support-callback-with-more-than-two-datas

support ep.done(function (err, data1, data2) {})
Update for pass multi result
Update document
添加contributors部分
Update docmentation
Remove jsdoc
Change setTimeout to nextTick