AI server: fixed enemy search ranges
AI server: monsters cast skills now after the cast time expires (really badly, temporarily..). Previously this was up to the client, but we block that (players controlling skill hits is arguably even more dumb than blocking NPC threads).
Game server/skill system: Skills such as "Beast Hiding" do not make players invisible when targeting monsters. Resolves #121.
Game server/skill system: allow scroll use with the various NPC transformation scrolls. Closes #125.