remove duplicate changelog entry
fix MANIFEST.SKIP entry
with the recent changes in URI::Escape, some tests now fail on older perls

Related to this change, in perl5121delta? "utf8::is_utf8 now respects GMAGIC (e.g. $1)"

e.g.:
http://matrix.cpantesters.org/?dist=URI%201.62
http://www.cpantesters.org/cpan/report/63892946-09b9-11e4-b698-db7a2867dcfa
prepare for 1.63 release