Split world database into game data and player data.

[Victov]

Currently the wrath-realm-db contains both game data (creatures, items, etc) and player data (characters, equipment, etc).

Split up wrath-realm-db into wrath-game-db containing game data (things that aren't supposed to change per realm), and make wrath-realm-db only contain realm-specific data, like player characters and items.

The idea is that two realms can read from the same wrath-game-db and each realm reads/writes to their own wrath-realm-db. The user permissions for wrath-game-db could even be read-only.