Rearranged the server-side object hierarchy (read more)

This has been a long-running problem for days, but I've finally
implemented a correctly working hierarchy between the ClientData,
AccountData and CharacterData objects:

CharacterData -> AccountData -> ClientData

There doesn't seem to be any issues with it right now, touch wood.

server/character_data.hpp

@@ -54,9 +54,6 @@ struct CharacterData {
 	float accuracy = 0.0;
 	float evasion = 0.0;
 	float luck = 0.0;
-
-	//uid
-	static int uidCounter;
 };
 
 #endif