- removed autotools-generated files, as usual for git-based projects (added build instructions to README instead)
modernize GObject type definitions (fixes segfault on startup on my Linux Mint 19.1 64-bit installation)
sample editor: sample selection, loop-end modification, and panning using mouse works again
sample editor: loop and current-position markers, colors
re-enable former "extspinbutton" functionality
initial gtk3 porting work
tracker: remove backing-store option, remove custom redraw-on-idle handling, print notes
cursor