Implements NOISSUE - Add "new room" button on sidebar

Req-sign-off: @mumia 

![screen shot 2013-12-30 at 16 25 10](https://f.cloud.github.com/assets/74459/1823129/50b3ff64-7173-11e3-80a9-99cbd58091c2.png)

![screen shot 2013-12-30 at 16 56 37](https://f.cloud.github.com/assets/74459/1823130/6706170c-7173-11e3-9474-18f5e8656116.png)