Add _signature (email signature used by Mutt, etc.).

diff --git a/_signature b/_signature
new file mode 100644 (file)
index 0000000..2b665b2
--- /dev/null
+++ b/_signature
@@ -0,0 +1,2 @@
+This email may be signed or encrypted with GnuPG (http://www.gnupg.org).
+For more information, see http://en.wikipedia.org/wiki/Pretty_Good_Privacy