Topic/utf8

In tandem with https://github.com/rjbs/Dist-Zilla/pull/220, this resolves all utf8 encoding issues with my canary distribution, Acme-CPANAuthors-Nonhuman (with source modified slightly to include proper Japanese and Russian names).

The phase rewrite isn't strictly necessary for the fix, but I was here and remembered I was annoyed last time at the strange use of phases, so I set about trying to do something about it -- and discovered the proper way to create and munge files so other plugins can also hook in in their own phases and re-munge things if desired.