Merge pull request #69 from yuche/patch-1

change collapse header's cursor to pointer

style/components/collapse.less

@@ -37,6 +37,7 @@
       line-height: 38px;
       text-indent: 16px;
       color: #666;
+      cursor: pointer;
       &:before {
         display: inline-block;
         content: '\20';