Core/Phases:
- redone how default terrain swaps are handled
- added new table for worldmaparea data
- only send terranswaps for player's current map
- always send all valid worldmaparea swaps for ingame worldmap
- added Hyjal's terrain swap as example, after turning in quest 25372, the Inferno area will change to Regrowth, both the terrain and the worldmap changes