Upgrade to Rapid Weaver 6.0

I've just upgraded to RapidWeaver 6.0 and may have broken a whole ton of links and formatting on the website. I needed to do this to enable me to reliably update content. If it all holds together over the coming weeks I'll being to change the look and feel of the site and update some of the existing content to better reflect recent changes to the swingbench family of tools.

Thanks for you patience