[Typo3-documentation] Document progress

[Jean-Marie Schweizer]

> What do you think? Is this the way we should do it (normally)?

Yes I think we should do it that way. The only thing to consider is that 
the glossary needs a different approach since the page (the whole 
glossary) will not be finished but many different entries will.

Maybe a simple line at the top of each  glossary entry will be 
sufficient enough? E.g.

document status: draft

Jean-Marie