Core/PacketIO: Implemented SMSG_WORLD_SERVER_INFO
Core/Instances: Fixed loading DungeonEncounters.dbc (-1 means all difficulties), thx Northstrider for pointing it out
Core/PacketIO: Send proper SPLINE_ROOT packets for stunned creatures
Core/Spells: Fix shaman talent "Tidal Waves"
Note: Drop charges for critical effect need fixing