Add drop option to FtInTitlePlugin
Fix formatting issues.
Drop parameter sticky
Disable video feed in ffmpeg's flac conversion

Video feeds may be found in flac files, and the current ffmpeg
conversion command does not ignore them, causing beets to fail
to convert the file.

Add `-vn` to the command line to fix the problem.

Fix issue #712.
Fix indent
Fix styling
Disable the video stream in all ffmpeg conversions

Propagate the previous commit's change to all ffmpeg command lines.
Merge pull request #714 from brunal/master

Disable video feed in ffmpeg's flac conversion
changelog thanks for #714
Merge branch 'SUTJael-ftintitle_drop'
config name change, changelog for #692
Catch and log file errors when embedding images

Fixes #723.
Test build with setup.py

Since some builds use `python ./setup.py test` to test beets we want to make
sure it runs smoothly.
Changelog for #723
Document/check non-emptiness in add_album