ENH - .mailmap file to harmonize git shortlog

Reduce duplicates in git shortlog

.mailmap

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+# Prevent git from showing duplicate names with commands like "git shortlog"
+# # See the manpage of git-shortlog for details.
+# # The syntax is:
+# # Name that should be used <email that should be used> Bad name <bad email>
+# #
+# # You can skip Bad name if it is the same as the one that should be used, and is unique.
+# #
+# # This file is up-to-date if the command git log --format="%aN <%aE>" | sort -u
+# # gives no duplicates.
+
+Nathaniel J. Smith <[email protected]> njsmith <[email protected]>
+Ralf Gommers <[email protected]> rgommers <[email protected]>
+Christoph Gohlke <[email protected]> cgholke <?@?>
+Christoph Gohlke <[email protected]> Christolph Gohlke <[email protected]>
+Christoph Gohlke <[email protected]> cgohlke <[email protected]>
+Ondřej Čertík <[email protected]> Ondrej Certik <[email protected]>
+Mark Wiebe <[email protected]> Mark <[email protected]>
+Mark Wiebe <[email protected]> Mark Wiebe <[email protected]>
+Mark Wiebe <[email protected]> Mark Wiebe <mwiebe@georg.(none)>
+Han Genuit <[email protected]> Han <[email protected]>