Increase speed of SqDT messages.

-Spacing/grammar changes.
-Removed repeated check for $ in SqFD (SqFDT handles this; SqFD isn't
used yet).
-Use piRow/piCol instead of Sending to self for them (variable is
faster).
-ReqSomethingMoved checks for $ row/col on what before checking distance
(stops mobs spawning on top of each other).