增加cell swipe组件 (#39)

* add cell swipe

* cell swipe

* bugfix

* test

* style

docs/examples-dist/cell-swipe.vue

@@ -0,0 +1,39 @@
+<template><section class="demo-cell"><h1 class="demo-title">Cell Swipe 滑动单元格</h1><example-block title="基础用法">
+                <van-cell-swipe :right-width="65" :left-width="65">
+  <van-cell-group>
+    <van-cell title="单元格1" value="单元格1内容"></van-cell>
+  </van-cell-group>
+  
+  <span slot="right" class="swipe-delete-btn">
+      删除
+  </span>
+  <span slot="left" class="swipe-check-btn">
+      选择
+  </span>
+</van-cell-swipe>
+
+              </example-block></section></template>
+<style>
+.swipe-delete-btn {
+    background-color: #FF4444;
+    color: #FFFFFF;
+    font-size: 16px;
+    width: 65px;
+    height: 44px;
+    display: inline-block;
+    text-align: center;
+    line-height: 44px;
+}
+.swipe-check-btn {
+    background-color: #84c483;
+    color: #FFFFFF;
+    font-size: 16px;
+    width: 65px;
+    height: 44px;
+    display: inline-block;
+    text-align: center;
+    line-height: 44px;
+}
+</style>
+<script>
+import Vue from "vue";import ExampleBlock from "components/example-block";Vue.component("example-block", ExampleBlock);</script>

docs/examples-dist/search.vue

@@ -3,6 +3,9 @@
 
 
 
+              </example-block><example-block title="基础用法">
+                <van-search placeholder="搜索商品" type="showcase"></van-search>
+
               </example-block><example-block title="监听对应事件">
                 <van-search placeholder="商品名称" @search="goSearch" @change="handleChange" @cancel="handleCancel"></van-search>