S12M_TIMECOD --> S12M_TIMECODE Old version is marked deprecated.
The RouteGroup containing the deleted routes emits the RouteRemoved signal; Session handles this and if the RouteGroup is now empty, deletes the RouteGroup *while in the middle of the signal emission process*.
Quantize, Legatize, Transform and Remove Overlaps (negative legatize) are all handy, and should be accessible here.
We already parse the EXIF side data to extract the orientation, so we should add it to the output file as an EXIF box.
Add missing files from previous commit.