JSDeferred http://www.cnblogs.com/rubylouvre/articles/1715393.html
Promises/A http://justjavac.com/javascript/2013/08/08/asynchronous-in-javascript-2-promises-a.html
Wind.js http://justjavac.com/javascript/2013/08/08/asynchronous-in-javascript-3-windjs.html
when.js https://github.com/cujojs/when