Rename PlayerImage to PlayerVideoFrame and give it its own file.
Move Eyes and ColourConversion into PlayerVideoFrame.
Make DCPVideoFrame use PlayerVideoFrame to store its image.
Add ImageProxy class.
Bump libdcp dep.
Add some comments.
Bump libdcp dep for timezone fixes.
Fix various confusions in translations of abbreviated channel names
(Lc, Rc etc.)

Reported-by: Carsten Kurz
Merge branch 'master' of ssh://main.carlh.net/home/carl/git/dcpomatic
Bump version
Bump version
Merge delay-decode-take2 branch into master.
ChangeLog.
Bump version
Bump version
Fix static build.
Revert "Fix static build."

This reverts commit 9367778a4e971510155320f052bb2d73ef5febdf.
Add some timing logs to image_proxy.
Tidy up logging a bit.  Make it configurable from the GUI.
Bump version