[Grok-doc] versioned documentation

[Martijn Faassen]

Hi Grok-doccers,

For a while now we've been versioning Grok's official documentation.
People can't really find this out however, as the older versions
aren't exposed on any web page. Well, they're here, but this isn't
linked anywhere and isn't very pretty:

http://grok.zope.org/doc/

Grok-doccers, any ideas on how to make this better? Someone want to
make an issue for it at least to track? :)

Regards,

Martijn