Add .mailmap file so that git shortlog reports stats better

Author: NathanW2

.mailmap

@@ -0,0 +1,13 @@
+Juergen E. Fischer  <fischer@linux-buechse.de>
+Juergen E. Fischer  <jef@norbit.de>
+Nathan Woodrow  <madmanwoo@gmail.com>
+Nathan Woodrow  <woodrow.nathan@gmail.com>
+Nathan Woodrow  <woo@woo-mint.(none)>
+Marco Hugentobler   <marco@marco-laptop.(none)>
+Marco Hugentobler   <marco.hugentobler@sourcepole.ch>
+Marco Bernasocchi <marco@bernawebdesign.ch>
+Marco Bernasocchi <<marco@placebo.(none)>
+Marco Bernasocchi <marco@bernawebdesign.ch>
+Marco Bernasocchi <marco@bernawebdesign.ch>
+Gary Sherman    <gsherman@geoapt.com>
+Gary Sherman    <gsherman@c8812cc2-4d05-0410-92ff-de0c093fc19c>