Added readme.

README.md

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+# Message of the Day
+
+Collection of my 'Message of the Day' scripts.
+
+
+### Requirements
+
+  * update-motd
+
+
+### How do I set it up?
+
+Copy the files you want in your MOTD to `/etc/update-motd.d/`. Make sure you have the `PrintMotd`
+option set to `yes` in your sshd config.