Remove A/B mode for now.
Remove gain/delay_line/matcher/trimmer.
Some tidying up. Do encode progress in the writer to improve progress bar movement with still-image DCPs (#130).
Merge master; fix crash on new film.
Connect Trimmer clsas.
Various bits.
XML metadata and some other bits.
Content can be added and previewed.
Runs.
shared_ptr is a bit excessive for DecodeOptions.
Split Options into encode / decode.
Integrated FFmpeg player (slow).
Untested rework of AB transcoder.
Untested external audio support; AB transcodes still broken.
Untested; more movement of stuff out of decoder.
Various work on range setting.
Merge FilmState / Film.
Subs successfully exported with thumbs.
Move things round a bit.