[Radiant] [ANN] "Shards" extension

[Keith Bingman]

> I ran into that error earlier.  I thought I had committed the fix, but
> I'll do it asap.  Thanks for the heads up.

Sean,

I found another minor bug, but one that drives us all nuts: the tree  
doesn't stay open on the Pages index.
You forgot the json on the page tree:

It is:

// <![CDATA[
   new SiteMap('site-map' %>);
// ]]>

but should be

// <![CDATA[
   new SiteMap('site-map', <%= expanded_rows.to_json %>);
// ]]>

And as long as I am being picky, the loading spinner doesn't shut  
off. I haven't figured out.

Now I am going to get to actually using this!

Keith