Copyright-holder and year information is extracted from git log.
git history begins in 2005. So (C) from 1998..2005 is lost. Also some
(C) assignment of commits where the committer didn't use --author.
- do not allow to simply copy the video file
- decision to transcode or just reference is made in "transcode dialog"
not during file-selection.
Only there the actual codec is known and can be judged to be suitable
for direct reference
- simplify "transcode dialog" - no more buttons for specific actions,
drop-down select actions.
- increase minimum bitrate for imported file to 500kbit/s
