[DCP-o-matic] DCP-o-matic 2.12.8 is released

Hi all, DCP-o-matic 2.12.8 is now available from https://dcpomatic.com/download This is a bug-fix release which corrects some problems with 2.12.6, and provides a couple of small improvements: Fix failure to load image files with non-ASCII pathnames. Fix some reel length errors at the end of transcodes. Prevent the introduction of negative trims (which cause encoding errors). Assume .jpf files are JPEG2000 images. Fix the update checker (#1338). Speed up the timeline in some cases. Add build for Fedora 28. Special thanks to our subscribers and supporters! Kind regards, Carl