fixed missing sprite reference

repairbot module was missing sprite call, hence making it invisible
Merge pull request #718 from Erthilo/Bleeding-Edge

Typos, stunglove onmob sprites, other tweaks.
Merge pull request #716 from MercuryDoll/patch-1

fixed missing sprite reference
Fix repairbots, add hovermommis.
Added securitrons.
Han-D Janitor Borg Sprite.