Add name mapping for short log stats.

GrahamDumpleton · GrahamDumpleton · commit 305a059e92a3 · 2015-02-12T19:54:15.000+11:00
diff --git a/.mailmap b/.mailmap
@@ -0,0 +1 @@
+Graham Dumpleton <Graham.Dumpleton@gmail.com> Graham.Dumpleton <devnull@localhost>

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+Graham Dumpleton <[email protected]> Graham.Dumpleton <devnull@localhost>`