Writing PNG with pure Python

[Johann C. Rocholl]

Ben Finney schrieb:
> Simplify. Please don't attempt to write yet another set of license
> terms without expert legal assistance. You've already chosen the Expat
> license as being acceptable; use that, and you grant all the rest
> without even mentioning it.

Sorry for my stubborn ignorance, and thank you for your patient
explanations.

I think I finally got it: I'll put the bulk of my browsershots project
under the GNU GPL again, and the independent library parts like png.py
under the Expat License.

Cheers,
Johann