gtkui: Sometimes we get a "change-value" signal after "button-release", and sometimes we don't; try to handle both cases.
cdaudio-ng: Update for libcdio 0.90. Closes: #239.
m3u: Don't stop parsing at blank lines. Closes: #241.
aosd: Don't crash on invalid trigger values. Closes: #243.
unix-io: Don't pop up an message box every time a file fails to open. Closes: #246.
gtkui: There is no "close_button_visible" hook.