Removes the click cooldown from almost everything, now it should be always be 0.1 seconds.

Ranged weapons and laser eyes have a cooldown of 0.4.
Grilles, windows, windoors, walls and blobs have a cooldown of 0.8.
Hitting mobs will also have a cooldown of 0.8.
Removes the unused USEDELAY flag.
Merge pull request #3216 from Aranclanos/ClickDownRemoval2

Click cooldown removal take 2