Summary of changes since 20160913 release:
- Slider widgets are now nicer to use with the mouse.
- Stereo to mono downmix command (Alt-Shift-D) in sample list was added.
- Channels are no longer automatically unmuted when entering notes into them.
keyjazz_write_noteoffoption was added (see configuration.md).
- New video
heightoptions were added (see configuration.md).
- The center row on the info page was changed to match Impulse Tracker.
- Minor IT and XM file format errors were fixed.