ENH: Use same mailmap naming as ITK.

.mailmap

@@ -1 +1,18 @@
-Matt McCormick <matt.mccormick@kitware.com> <matt@mmmccormick.com>
+# See "git help shortlog" section "MAPPING AUTHORS"
+Luis Ibanez <luis.ibanez@kitware.com>
+Hans J. Johnson <hans-johnson@uiowa.edu> Hans Johnson <hans.j.johnson@gmail.com>
+Gaëtan Lehmann <gaetan.lehmann@jouy.inra.fr>
+Arnaud Gelas <arnaudgelas@gmail.com> <arnaud_gelas@hms.harvard.edu>
+Alexandre Gouaillard <agouaillard@gmail.com>
+Andrew Wasem <drewwasem@gmail.com>
+Matthew McCormick <matt.mccormick@kitware.com> <matt@mmmccormick.com>
+Brian Avants <stnava@gmail.com>
+Nick Tustison <ntustison@gmail.com> <ntustison@wustl.edu>
+Xiaoxiao Liu <liuxiaoxiao@gmail.com>
+Francois Budin <francois.budin@kitware.com> <francois.budin@gmail.com>
+Dženan Zukić <dzenan.zukic@kitware.com> Dzenan Zukic <dzenanz@gmail.com>
+Davis Vigneault <davis.vigneault@gmail.com>
+Yann Le Poul <le-poul@biologie.uni-muenchen.de>
+Lucas Gandel <lucas.gandel@kitware.com>
+Ramraj Chandradevan <cramraj8@gmail.com>
+Stephen R. Aylward <stephen.aylward@kitware.com>