http://mrdoob.github.io/three.js/
http://www.html5tricks.com/cool-html5-3d-animation-pick.html
在调试阶段为了减少缓存问题
或者是微信浏览器自动拉取每次都自动拉取问题
http://www.jb51.net/html5/305283.html
<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="0" />