Renamed some of Get() methods to Find(), read more

From now on, ideally any function with "get" in the name should always
return a valid value. A function with "find" in the name, however, does
the same thing, but may also return an invalid result such as an error
code.

server/rooms/room_manager.hpp

@@ -43,8 +43,8 @@ public:
 	void PopCharacter(CharacterData const* character);
 
 	//accessors and mutators
-	RoomData* Get(int uid);
-	RoomData* Get(std::string name);
+	RoomData* Find(int uid);
+	RoomData* Find(std::string name);
 	int GetLoadedCount();
 	std::map<int, RoomData>* GetContainer();