Updated tabbed interface- fixed issue #65 & #67

I have fixed issue #65 and issue #67. @kwpembrook

I changed a little bit the tabbed interface css files. I am attaching the pictures. Let me know if this is ok. @kwpembrook@apotheos 
![screenshot 2014-02-24 19 16 35](https://f.cloud.github.com/assets/6364701/2253290/a7d63082-9dba-11e3-9452-9ecd97713e5b.png)
![screenshot 2014-02-24 19 16 59](https://f.cloud.github.com/assets/6364701/2253291/aa8ffe70-9dba-11e3-90e5-5c53a8e3d797.png)
I found out a small bug for the interface of editor page: there is a white line behind the tabbed interface. I've tried to get rid of it and I don't think that line is from the tabbed interface. Could you check it out, @mboie