Add mailmap file to identify users with different email/names

This is useful for git shortlog - see:
http://simonharrer.wordpress.com/tag/git-shortlog/

.mailmap

@@ -0,0 +1,11 @@
+Andrew Ingram <andrew.ingram@tangentlabs.co.uk> AndrewIngram <andy@andrewingram.net>
+Sebastian Vetter <sebastian.vetter@tangentone.com.au> Sebastian Vetter <sebastian@roadside-developer.com> Sebastian Vetter <sebastian.vetter@tangentsnowball.com.au>
+Andy Sellick <andy.sellick@tangentone.co.uk> Andy Sellick <andy.sellick@tangentsnowball.com>
+Patryk Zawadzki <patrys@pld-linux.org> Patryk Zawadzki <patrys@room-303.com>
+John Papanastasiou <johnpapps@hotmail.com> John Papanastasiou <johnpapps@ubuntu.(none)>
+Jonathan Moss <jonathan.moss@tangentone.com.au> Jonathan Moss <xirisr@gmail.com>
+Kura <kura@deviling.net> Kura <kura@tangentlabs.co.uk>
+Mohammad Abbas <mohammad.abbas86@gmail.com> Mohammad Abbas <mohammad@mohammad-abbas.(none)> Mohammad Abbas <mohammad@mohammad-laptop.(none)>
+Oliver Randell <oliverrandell@gmail.com> OliverRandell <oliverrandell@gmail.com>
+Paweł Kowalski <bitrut@gmail.com> Paweł Kowalski <contact@pawelkowalski.info>
+Łukasz Lechowicz <llechowicz@gmail.com> Łukasz Lechowicz <owad@owad.(none)>