[Grok-doc] community documentation review

[Jan-Wijbrand Kolman]

Hi,

With the Grok 1.2 release, quite some things have changed.

I think it would be good if:

1) We could write a document targeted at readers of the Grok book to 
briefly explain key differences.

2) We would review the community doccumentation on grok.zope.org and see 
if we need to update documentation for this release.

kind regards, jw