[Typo3-documentation] Document progress

[Jean-Marie Schweizer]

> The best way to go ahead now would be to write in the wiki and then, in 
> a few months, start looking for "stable" articles. It will be fairly 
> obvious - those that aren't changed for a while will be ready to publish.

I don't know if that is wise to do. Just because an articles hasn't been 
update for a while doesn't make it stable.

> I don't think the wiki should be made to be too formal - just put 
> content in to start with...

I agree. I think for right now we just should come up with an agreeable 
way to work and find out in a few months what works and what doesn't.

Jean-Marie