musicbrainz/picard — pull request #388 by phw (2014-12-16 14:42:47+00:00)
Title: Fix errors during configuration update when reading obsolete options.

This fix makes old confiuration options, for which there is no Option instance in the code anymore, accessible.

Fixes [PICARD-642](http://tickets.musicbrainz.org/browse/PICARD-642).

@bitmap: Since you reworked the parts of the code that finally led to this, you maybe have some better idea how to implement this.