The eclass was removed from Gentoo, so we followed suit. This broke
the pkg-auto code. Thus I imported the eclass into the impl directory
as gentoo_ver.sh, threw away all the unnecessary parts and moved some
from pkg_auto_lib.sh to the new file.
This allowed me to also drop a hack where I was grepping for the
version regexp in the eclass. Now I'm just exporting it.
This adds some scripts I have been using for over a year to deal with
the weekly package updates.
It comes with a `README.md` which describes a workflow similar to my
own.
The `sync_packages.sh` and `update_packages.sh` scripts are currently
not used anywhere. The idea behind them was to use them for Github
Action, but that will come as a follow-up PR.
