Add .mailmap to clean up the output of `git shortlog -nes`
diff --git a/.mailmap b/.mailmap
new file mode 100644
index 0000000..15b3849
--- /dev/null
+++ b/.mailmap
@@ -0,0 +1,2 @@
+Joe Williams <williams.joe@gmail.com> <joe@joetify.com>
+Joe Williams <williams.joe@gmail.com> <williams.joe@gmail.com>