saberma/19wu — pull request #360 by saberma (2013-05-23 14:54:26+00:00)
Title: 显示活动管理菜单

如下图：

![event_menu](https://f.cloud.github.com/assets/15178/555139/6189e0ba-c3b8-11e2-8e40-0330c513551f.png)

![event_menu_1](https://f.cloud.github.com/assets/15178/555152/882e1f42-c3b8-11e2-8545-76bb4dfdf7ef.png)

引入 `tabs_on_rails` Gem，用于显示菜单