Need new release for python 3.x

[abs0]

The last gng release was in 1.0.3 and doesn't support python 3.

This is not a problem for anyone installing the latest version directly, but is a little bit for packaging systems which wish to include gng, as they either have to pick an arbitrary tag, or local patch - e.g. https://pkgsrc.se/devel/gng

Thanks