automake: move aclocal, autoconf, automake commands into prepare

python: start to modernize

License: Include the license file in the doc subpackage if the license requires it

Strip leading `v` from package versions

Many projects add a leading `v` to tags for versions. However, the
contents of tarballs don't include this, so `$builddir` ends up being
`package-v1.0.0`, but the real path is actually `package-1.0.0`.

I haven't seem any scenarios where a leading `v` is present but this
doesn't uphold.

That aside, APKBUILD conventions seem to align with removing the leading
`v`.

write error messages to stderr

Add the --subdir option for deeply nested makefiles

Adding support for a few GitLab instances

Don't crash on tags without a number

Add automake support

Better template for cmake tests

Bump version to 0.2.0

Update example results

Require cmake for building cmake projects

Aport generation cleanup

Support the python buildsystem

Support commits for sourcehut

Better error for untagged sourcehut repos

Set empty keys on sourcehut

Add license

Sourcehut support