play: Log a message when no output is produced
Merge pull request #1070 from frubino/master

Added backed audiotools to replaygain module and updated documentation
Quiet down logging in #1070

This looks mostly helpful for debugging but redundant with the ordinary
logging.
Fix up docs, changelog for #1070
Fix ftintitle auto permanence (#485)

Oops. Plugins need to store to the database.
Fix credit for #1070
Update ALAC tests for Mutagen 1.26

The metadata extraction is now more accurate for ALACs, but we lost the
ability to distinguish them from AAC.