add an option to disable the spammy warning
PodWeaver 4 now includes -SingleEncoding
also mention the CPAN.pm and CPANPLUS options to fix
improve heuristic for detecting whether we really are a fallback
better error message
Dist-Zilla-Plugin-MakeMaker-Fallback-0.005

          - warnings can now be bypassed entirely with the
            PERL_MM_FALLBACK_SILENCE_WARNING environment variable
          - now also mentioning the relevant CPAN.pm/CPANPLUS configuration
            options