Refactored plugins & Spout Support

- Changed the way plugins interact with the RPG_Core plugin:
- RPG_Core still handles main data (such as players) and connections to
the DB
- RPG_BattlefieldManager handles Flags and Outposts
- RPG_NPCManager handles NPCs and NPCTemplates
- RPG_QuestManager handles Quests
- RPG_WorldManager handles Worlds
- Added mob types for future use with the RPG_QuestManager
- Disabled some of the RPG_NationManager and RPG_PermissionManager
functionality because this will be redone in a future commit
- Started adding Spout support