Added admin logs for mechs.
Fixed the mech sleeper sprite.

The logs are:
Mob logs for clamp, drill and "empty" hits, and syringe gun and sleeper injected reagents.
Also all the different ranged guns.
Added an admin notice and server log for the honkerblast, wormwhole generator and gravity catapult. These notices have a quick jump to mob, admin-PM and (?) button. They are pretty cool.
Merge pull request #841 from Aranclanos/MechLogging

Mech admin logs.