Issue title: how to scroll source panel?
 Issue body: when using coffeescript, the source panel of the transliterated javascript does not have a scroll bar.  How do I see the javascript code that is rendered below the viewport?

 Comments: 
 Comment 0: This is a bug. I will get it fixed in a few days and let you know.

On Sun, 28 Jul 2013 15:38:59 -0400, rickdog joshuabowman@example.net  
wrote:

> when using coffeescript, the source panel of the transliterated  
> javascript does not have a scroll bar. How do I see the javascript code  
> that is >rendered below the viewport?
> 
> —
> Reply to this email directly or view it on GitHub.

 Comment 1: It's been fixed on the site. 

 Comment 2: thank you kindly

On Sun, Jul 28, 2013 at 6:18 PM, Yuguang Zhang joshuabowman@example.net:

> It's been fixed on the site.
> 
> —
> Reply to this email directly or view it on GitHubhttps://github.com/yuguang/fiddlesalad/issues/22#issuecomment-21693368
> .

 Comment 3: No problem, thanks for reporting it. I think the bug showed up after the  
recent upgrade of the editor library. The version on the site now also  
shows JavaScript errors in the result window. For CoffeeScript, it shows  
on hover.

On Sun, 28 Jul 2013 20:01:20 -0400, rickdog joshuabowman@example.net  
wrote:

> thank you kindly
> 
> On Sun, Jul 28, 2013 at 6:18 PM, Yuguang Zhang  
> joshuabowman@example.net:
> 
> > It's been fixed on the site.—Reply to this email directly or view it on  
> > GitHubhttps://github.com/yuguang/fiddlesalad/issues/22#issuecomment-21693368 
> > .
> 
> —
> Reply to this email directly or view it on GitHub.

 Comment 4: thank you, you have the best jsfiddle-like clone out there!  Many very nice
features.

On Sun, Jul 28, 2013 at 7:17 PM, Yuguang Zhang joshuabowman@example.net:

> No problem, thanks for reporting it. I think the bug showed up after the
> recent upgrade of the editor library. The version on the site now also
> shows JavaScript errors in the result window. For CoffeeScript, it shows
> on hover.
> 
> On Sun, 28 Jul 2013 20:01:20 -0400, rickdog joshuabowman@example.net
> wrote:
> 
> > thank you kindly
> > 
> > On Sun, Jul 28, 2013 at 6:18 PM, Yuguang Zhang
> > joshuabowman@example.net:
> > 
> > > It's been fixed on the site.—Reply to this email directly or view it on
> > > GitHub<
> > > https://github.com/yuguang/fiddlesalad/issues/22#issuecomment-21693368>
> > > .
> > 
> > —
> > Reply to this email directly or view it on GitHub.
> 
> —
> Reply to this email directly or view it on GitHubhttps://github.com/yuguang/fiddlesalad/issues/22#issuecomment-21694262
> .

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