Implemented bare-bones character system API

I need to devise a way to update the clients about changes to their
characters directly from the lua scripts. This isn't too important per se,
but the pattern will be important for the monster and trigger systems.

server/characters/character_manager.hpp

@@ -44,13 +44,18 @@ public:
 
 	//accessors and mutators
 	CharacterData* Get(int uid);
+	CharacterData* Get(std::string handle);
 	int GetLoadedCount();
 	int GetTotalCount();
 	std::map<int, CharacterData>* GetContainer();
 
+	//API interface
 	sqlite3* SetDatabase(sqlite3* db);
 	sqlite3* GetDatabase();
 
+	//hooks
+	//TODO: character hooks
+
 private:
 	friend Singleton<CharacterManager>;