added .mailmap

Now each committer has only one entry in shortlog
$ git shortlog -sn
  2094	John Hunter <[email protected]>
  1678	Michael Droettboom <[email protected]>
   916	Eric Firing <[email protected]>
   432	Darren Dale <[email protected]>
   355	Jae-Joon Lee <[email protected]>
   272	Andrew Straw <[email protected]>
   263	Steve Chaplin <[email protected]>
   194	Jouni K. Seppänen <[email protected]>
   149	Charles Moad <[email protected]>
   146	Ryan May <[email protected]>
   124	Ben Root <[email protected]>
    59	Jeff Whitaker <[email protected]>
    53	Manuel Metz <[email protected]>
    48	Norbert Nemec <[email protected]>
    45	James Evans <[email protected]>
    42	pkienzle <pkienzle@localhost>
    42	Todd Miller <[email protected]>
    29	Paul Barret <[email protected]>
    25	Michiel de Hoon <[email protected]>
    23	Jochen Voss <[email protected]>

Author: ivanov

.mailmap

@@ -0,0 +1,7 @@
+John Hunter <[email protected]> jdh2358 <[email protected]>
+Michael Droettboom <[email protected]> Michael Droettboom <[email protected]>
+Jouni K. Seppänen <[email protected]> Jouni K. Seppänen <[email protected]>
+Ben Root <[email protected]> Benjamin Root <[email protected]>
+Michiel de Hoon <[email protected]> Michiel de Hoon <[email protected]>
+Kevin Davies <[email protected]> Kevin Davies <[email protected]>
+Christoph Gohlke <[email protected]> cgohlke <[email protected]>