add help button

src/index.html

@@ -140,6 +140,12 @@
                             </li>
                         </ul>
                     </li>
+                    <li class="divider"></li>
+                    <li>
+                        <a class="toolbar" title="{{'Help' | translate}}" href="http://github.com/mayswind/AriaNg" target="_blank">
+                            <i class="fa fa-question-circle-o"></i>
+                        </a>
+                    </li>
                 </ul>
             </div>
             <div class="navbar-searchbar hidden-xs">

src/langs/zh_CN.txt

@@ -20,6 +20,7 @@ Select All=全选
 Select None=不选
 Select Invert=反选
 Display Order=显示顺序
+Help=帮助
 Search=搜索
 Default=默认
 Expand=展开

src/scripts/config/defaultLanguage.js

@@ -24,6 +24,7 @@
             'Select None': 'Select None',
             'Select Invert': 'Select Invert',
             'Display Order': 'Display Order',
+            'Help': 'Help',
             'Search': 'Search',
             'Default': 'Default',
             'Expand': 'Expand',