fix RT#85274

the dash "–" is not plain old ASCII "HYPHEN-MINUS" (U+002D), but Unicode "EN DASH" (U+2013), hence the warning; it is changed to ASCII minus

UTF-8 Pod marker is also added, since it is always a good thing to have one :)
fix Changes to comply w/CPAN::Changes::Spec
remove redundant files
Merge pull request #1 from sergeyromanov/patch-1

Dist enhancements

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