Add a mailmap file to help out the contributors list

Author: genio

.mailmap

@@ -0,0 +1,18 @@
+# https://www.kernel.org/pub/software/scm/git/docs/git-shortlog.html#_mapping_authors
+Chase Whitener <capoeirab@cpan.org> <cwhitener@gmail.com>
+Chase Whitener <capoeirab@cpan.org> <chase.whitener@infotechfl.com>
+Christopher J. Madsen <cjm@cpan.org> <perl@cjmweb.net>
+Gisle Aas <gisle@aas.no> <aas@oslonett.no>
+Gisle Aas <gisle@aas.no> <gisle.aas@it.uib.no>
+Gisle Aas <gisle@aas.no> <gisle@activestate.com>
+Gisle Aas <gisle@aas.no> <gisle@baux-2.lan>
+Jason A Fesler <jfesler@gigo.com> Jason Fesler
+Jason A Fesler <jfesler@gigo.com> <jfesler@badamount-lm.corp.yahoo.com>
+Jason A Fesler <jfesler@gigo.com> <jfesler@yahoo-inc.com>
+Karen Etheridge <ether@cpan.org> <github@froods.org>
+Mark Stosberg <mark@stosberg.com> <MARKSTOS@cpan.org>
+Mark Stosberg <mark@stosberg.com> <mark@summersault.com>
+Mike Schilli <github@perlmeister.com> mschilli
+Mike Schilli <github@perlmeister.com> Mike Schilli <mschilli@yahoo-inc.com>
+Slaven Rezic <slaven@rezic.de> <srezic@iconmobile.com>
+Ville Skyttä <ville.skytta@iki.fi> Ville Skytta