Now mango supports adjusting the tiled window size by dragging with the mouse or resizewin keybind.(except gird and monocle layout)

break change

• spiral,dwindle layout remove
• smfact and set_smfact is removed
• center_when_single_slave change name to center_when_single_stack

feat

• support resize tile window
• add setoption dispatch to allow change option by mmsg

fix

• some client miss set borderpx when reload config