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+rgdd's public archive of slides, notes, etc.  Mainly meant to serve rgdd, but if
+it also serves someone else that is great.  I'm not picky if (at your own risk)
+you re-use something from here, say a figure or an idea for an outline.  Just
+use your own best judgement and feel free to ask me if you feel unsure.
+
+These days I mostly put one thing per repo.  Clone submodules as follows:
+
+    $ git submodule update --init --recursive