Get rid of unused variables for storing starting point of pointer when moving and resizing.
Get rid of unused variables for storing starting point of pointer when
moving and resizing.

Only raise window once when resizing!

Stop querying for pointer position ourself. Don't use motion hinting
anymore and get real coordinates with motion event. See Gajewska and
Manasse: "Why X Is Not Our Ideal Window System".

Updated some comments.

tkln/mcwm,bbidulock/mcwm,tkln/mcwm,bbidulock/mcwm