Upgrading to latest RTE editor

[Dave Johnson]

I've upgraded to the latest version of the RTE editor and it appears to 
be working fine on my site. The new version adds support for tables and 
XHTML output.

RTE editor home page is here:
http://www.kevinroth.com/rte/demo.htm
If there are no objections, I'll commit it to trunk.

- Dave