Adding TitleIndex link to start page of Community Docs

[Craig Box]

> it's quite normal to get little reaction to wiki ideas. Maybe people
> here prefer working on the static docs. 

A lot of people either don't have the time, or object directly by editing
the page, and not commenting on the list.  I know I'd like to have time for
editing more wiki pages, as these interest me more than the static docs, but
I'm spread pretty thin!

Craig