remove PWP::Encoding from skel/ and dist itself

OK, and now for something slightly different

see the exetended commit message (8f5dc79) and [Rik's post](http://rjbs.manxome.org/rubric/entry/2021) for details

you may also comment/like my [quest on Questhub](http://questhub.io/realm/perl/quest/5277f3cc9f567ad56f0000e7) :)