DeepSelect: rename to TreeSelect

docs/examples-docs/changelog.md

@@ -21,7 +21,7 @@
 
 **合并的 Pull Request (可能有不兼容改动):**
 
-- Add deep-select component and fix a popup bug. [\#103](https://github.com/youzan/vant/pull/103) ([Tinysymphony](https://github.com/Tinysymphony))
+- Add tree-select component and fix a popup bug. [\#103](https://github.com/youzan/vant/pull/103) ([Tinysymphony](https://github.com/Tinysymphony))
 - Doc: update Step/Loading/Tag/Badge documents [\#101](https://github.com/youzan/vant/pull/101) ([chenjiahan](https://github.com/chenjiahan))
 
 ## [v0.8.7](https://github.com/youzan/vant/tree/v0.8.7) (2017-08-29)

docs/examples-docs/tree-select.md

@@ -74,13 +74,13 @@ export default {
 }
 </script>
 
-## DeepSelect 分类选择
+## TreeSelect 分类选择
 
 ### 使用指南
 ``` javascript
-import { DeepSelect } from 'vant';
+import { TreeSelect } from 'vant';
 
-Vue.component(DeepSelect.name, DeepSelect);
+Vue.component(TreeSelect.name, TreeSelect);
 ```
 
 ### 代码演示
@@ -89,13 +89,13 @@ Vue.component(DeepSelect.name, DeepSelect);
 
 :::demo 基础用法
 ```html
-<van-deep-select
+<van-tree-select
   :items="items"
   :main-active-index="mainActiveIndex"
   :active-id="activeId"
   @navclick="onNavClick"
   @itemclick="onItemClick"
-></van-deep-select>
+></van-tree-select>
 ```
 
 ```javascript