move old usersGuide for Chords out so doesn't clobber iPython version

git-svn-id: http://music21.googlecode.com/svn/trunk@3406 5c16147e-a200-11de-b0cc-ab0ad15e60d0
fixed up output of iPython notebook user's guide conversion...

git-svn-id: http://music21.googlecode.com/svn/trunk@3407 5c16147e-a200-11de-b0cc-ab0ad15e60d0