This commit also includes:
- whitespace / code formatting fixes
- slight syntax related changes: except <exception_name>, e -> except <exception_name> as e
- 3 pointless instructions instances have been rewritten [sorted] (spotted by semi-automatic check)
The unrelated changes shouldn't have any real impact on whipper's behaviour.
* Use cdrdao to detect CD-Rs and continue ripping only if the argument --cdr is passed.
* Get and display disc format from MusicBrainz.
* Add info about CD-R detection to logger
* Remove Musicbrainz medium format info
* add cdrdao command to logger
* Fix for PEP8
* Fix line break
