[DRAFT] adding draft first version

[kreativmonkey]

Adding a switch to print "Draft" Watermark on the Page. That is Usefull to be not confused by different versions of the PDF. Scince you generate the final version, remove the draft and you never send the wrong versions.

Actual issues:

• In draft mode you can't mark text!
• The size is not correct on each page...

[aslmx]

nice one!
The default for the Draft/Watermark text is a bit huge. The word "Draft" did not even fit completely on A4.
otherwise it worked straight forward.

I don't think we should put it into the metadata of the default template, but maybe some explanatory words in the beispiel.md itself would be cool

Proposal:

Entwurf / Wasserzeichen

In manchen Fällen ist es hilfreich einen Entwurf deutlich zu kennzeichnen. Das Template erlaubt das Setzen eines Wasserzeichens über folgende Metadaten

draft:
  text: "Entwurf v0.1!"

Wenn nur draft gesetzt wird, so wird das Default Wasserzeichen "Draft" auf jede Seite gedruckt.
Über draft.text kann man ein eigenes Wasserzeichen definieren.

[aslmx]

[ ] In draft mode you can't mark text!

Yep. That is pretty annoying. It is not completely impossible, but very quirky in Okular.