xnh6.1

xNetHack Version 6.1 Release

So fresh I never changed the NH_DEVEL_STATUS back to in progress!

This release is being made in order to get the new Archeologist quest
out the door before Junethack 2021.

Since this is a minor release, its changes are listed in the 7.0
changelog rather than a separate 6.1 changelog. I figure this will be
less confusing when 7.0 comes out.

Windows binaries are available to download on the Github release page.