move css-animation to demo

components/motion/demo/basic.md

@@ -7,7 +7,7 @@
 ---
 
 ````jsx
-var cssAnimation = antd.cssAnimation;
+var cssAnimation = require('css-animation');
 var motions = [];
 motions = motions.concat([[{
   name: '淡入',

index.js

@@ -14,8 +14,7 @@ var antd = {
   Popconfirm: require('./components/popconfirm'),
   confirm: require('./components/modal/confirm'),
   Steps: require('./components/steps'),
-  InputNumber: require('./components/input-number'),
-  cssAnimation: require('css-animation')
+  InputNumber: require('./components/input-number')
 };
 
 module.exports = antd;

scripts/demo.js

 window['react-router'] = require('react-router');
+
+window['css-animation'] = require('css-animation');