http://segmentfault.com/a/1190000000347412
http://www.xker.com/page/e2015/06/199141.html
http://www.runoob.com/angularjs/angularjs-application.html
http://blog.csdn.net/lglgsy456/article/details/36902179
http://www.tuicool.com/articles/nM7bauz
http://www.tuicool.com/articles/rABfUvm