Fix D2k DamagesConcrete overrides

Makefile: Fail target version when not a git repository

Remove the 'docs' target from the windows make file

Restore missing versioned source code package.

Remove obsolete --check-runtime-assemblies utility command.

Remove obsolete --check-runtime-assemblies utility command.

Switch Appimages to net 5.

Add support for dotnet core for Windows

Use ULFO format for non-compat disk images (requires macOS 10.11+).

Use ULFO format for non-compat disk images (requires macOS 10.11+).