NFLabs/zeppelin — pull request #97 by Leemoonsoo (2014-09-16 22:45:10+00:00)
Title: Collapse / Uncollapse editor at once

I've added button that show / hide editor in all paragraph in a notebook.

![image](https://cloud.githubusercontent.com/assets/1540981/4296160/d423ac5e-3df2-11e4-83b8-c0290c110e2f.png)