add gpg.conf.

It's enough related to shell-things.

gpg.conf

@@ -0,0 +1,28 @@
+# Options for GnuPG
+# Copyright 1998, 1999, 2000, 2001, 2002, 2003,
+#           2010 Free Software Foundation, Inc.
+# 
+# This file is free software; as a special exception the author gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+# 
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#
+# Unless you specify which option file to use (with the command line
+# option "--options filename"), GnuPG uses the file ~/.gnupg/gpg.conf
+# by default.
+#
+# An options file can contain any long options which are available in
+# GnuPG. If the first non white space character of a line is a '#',
+# this line is ignored.  Empty lines are also ignored.
+#
+# See the man page for a list of options.
+
+default-key 3913CB03
+default-recipient-self
+encrypt-to 3913CB03
+charset UTF-8
+keyserver hkp://pool.sks-keyservers.net
+keyserver-options auto-key-retrieve no-include-revoked verbose