fixed documentation errors

git-svn-id: http://music21.googlecode.com/svn/trunk@3342 5c16147e-a200-11de-b0cc-ab0ad15e60d0
test commit (updated copyright)

git-svn-id: http://music21.googlecode.com/svn/trunk@3343 5c16147e-a200-11de-b0cc-ab0ad15e60d0
fix metadata testFiles clobber namespace error

git-svn-id: http://music21.googlecode.com/svn/trunk@3344 5c16147e-a200-11de-b0cc-ab0ad15e60d0