Fixups to scripting engine dead locking, UnknownMan written, ProficiencyGod written, AncientPotion written

Core:\n- Fixed a dead lock condition with the scripting engine.\n- AncientPillTimer is now stored in DbClient.\n\nAttack/Spell:\n- Prof and Spells leveling now factors in AncientPill.\n\nScripts/Npc:\n- UnknownMan implemented (db leveling).\n- ProficiencyGod implemented (Unlearn Spell / UnlearnProf / Prof & Spell DoubleExp).