version 1.3.0

Desktops (group) support: -d option.
Multihead (xrandr) support: -vp, -sc options.
More responsive main event loop.
Sortlist rewritten as double-linked utlist.
MRU sort order follows EWMH active window or FocusIn event.
Mouse support.
Keys-related options use symbolic keysym names.
Incorrect arguments abort execution instead of complain.
Trim lists on windows destruction event, avoid leak.
No MAXWINDOWS limitation.
Use stacking window list if WM supports it.