add start end demo for datepicker

components/datepicker/demo/range.md

@@ -1,6 +1,6 @@
 # 范围
 
-- order: 3
+- order: 6
 
 设置 `disabledDate` 方法，来确定不可选时段。
 

components/datepicker/index.jsx

@@ -60,7 +60,10 @@ function createPicker(TheCalendar) {
       this.setState({
         value: v
       });
-      let timeValue = new Date(v.getTime());
+      let timeValue = null;
+      if (v) {
+        timeValue = new Date(v.getTime());
+      }
       //onSelect为向前兼容.
       if (this.props.onSelect) {
         require('util-deprecate')(this.props.onSelect, 'onSelect property of Datepicker is deprecated, use onChange instead')(timeValue);

package.json

@@ -1,6 +1,6 @@
 {
   "name": "antd",
-  "version": "0.10.0-beta2",
+  "version": "0.10.0-beta3",
   "stableVersion": "0.9.1",
   "title": "Ant Design",
   "description": "一个 UI 设计语言",