[Radiant] [ANN] Simpler reorder extension

[Sean Cribbs]

With Adam's permission, I have replaced the reorder extension in the 
Radiant repository with the simpler one I developed recently.  Instead 
of adding a separate view with drag-and-drop, it adds up/down/top/bottom 
buttons to the sitemap.  

You can use Subversion to download it from:

http://dev.radiantcms.org/svn/radiant/trunk/extensions/reorder

Enjoy!

Sean