data: Add band entry in mlm.ui.
libmlm: Add support for album band through the TPE2 tag.
copy-tags: Copy album band tag.
tags: Support album band tag.
gui: Add support for album band tag.
verify: Update Copyright notice.
accommodator: Do not try to accommodate without enough information.
gui: Keep the original image if loading a new one failed in
ApplicationWindow. Simplify RecordingDialog.
Add PrettyBox class and clean up the Util class so we can have just
one color method. This simplifies a lot the class Tags.