Wrote an update on the NSUInteger/NSInteger situation in bleh_darwin.m.
Added borders to GTK+ Listboxes (thanks to jlindgren in irc.gimp.net/#gtk+); ends that TODO.
Added thanks comment (see previous commit).
Added details of application termination handling.
Added (untested; VM issues) code to handle Mac OS X Quit Dock menu items and other related stuff that may happen in the future. Will drop the TODO after I can test it.
Fixed AppQuit on Mac OS X (forgot to set the NSApp delegate AND was using the wrong selector).
Removed the TODOs about AppQuit: fixed on OS X, never a problem on Windows, unfixable elsewhere (these are window manager window-local(? apparently...) events so they never hit us; thanks to some people in irc.gimp.net/#gtk+). Also added some notes to the future plans document (related to all that).
Updated Area's KeyEvent documentation to talk about some window managers on Unix intercepting some events; also updated the keyboard test program to make a note of behaviors related to that.