support cdrdao as backend #11
Description
According to http://forums.musicbrainz.org/viewtopic.php?id=2400 icedax sometimes has issues with extracting invalid ISRCs.
cdrdao seems to fix this.
It is unknown if using cdda2wav istead of the fork icedax also solves problems like these.
The mineo version of isrcsubmit uses cdrdao: https://github.com/mineo/mbstuff/blob/master/isrcsubmit-cdrdao.py