OS X version of the Explorer Visual Tour now online

[Ian Clatworthy]

Thanks to Neil Martinsen-Burrell, we now have an OS X version of the
Explorer Visual Tour online. See
http://doc.bazaar-vcs.org/explorer/en/visual-tour-macosx.html. We
probably need to tweak a few image sizes but ... wow!

We have a volunteer (thanks Algis) collecting images for a GNOME
version. I'm still keen to put together a KDE version as well if someone
collects the images.

Ian C.