Add the normalized version to the note on Macs. Work around issue #500.
(I still think this should be solved at another level, during syncs.)
Avoid names that would clash on Macs (i.e., after a unicode normalization).
Also do use a for loop. A bit more readable, probably a tad quicker when something is found.
Bump version.
Merge remote-tracking branch 'origin/master' into ospalh-special

Conflicts:
	downloadaudio/exists.py