Core/Config: Refactored ConfigMgr

* Loading initial configuration files is now separate from loading any additional custom configs
DB/Gossip: Add missing gossip for Sputtervalve. Moved all scripting to SAI.
DB/Gossip: Gossip fixup for Drull and Tog'thar
DB/Gossip: Added gossip for Morridune.
Scripting/Black Fathom Deeps: Fixed script to use proper spell.
DB/Gossip: Add and fix a few more gossip menus.
DB/Misc: Few fixes for Naxxramas.
DB/Gameobject: Fix spawnMask for Orb of Naxxramas
DB/Condition: Fix startup error
Core/Conditions: Add more infos for invalid skill condition log error
TDB 335.52 - 2013/07/17
DB/Conditions: Fix error in a previous commit.
DB/Gossip: Added missing gossip for Royal Historian Archesonus. Removed cpp script.
DB/Gossip: Add some missing gossip.
SQL: Fix sql import error