Hi Petr,

I had a look at the date2name repository in Github, and it doesn't 
look like it has any instructions for packaging it at all. I'm not 
sure how they build things to distribute over pypi.

At any rate, it looks like it's mostly a matter of marking 
__init__.py as executable, and renaming it to bin/date2name, so 
I've attached a package definition that does that. I have 
confirmed that I am able to build and run it, but I can't confirm 
its behaviour as I don't use the tool.

I hope that helps!

Carlo