Implemented SharedParameters system in the client (read more)

Here are more tweaks:
* InWorld's quit event now exits to the main menu, bypassing a relayed disconnect message
* InWorld's disconnect hander no longer throws exceptions (dropped creation packet bugfix)
* CombatData's internals now point to std::pair objects
* Enemies are stored in a global list

server/enemy_data.hpp

@@ -43,6 +43,8 @@ struct EnemyData {
 	//NOTE: these are lost when unloaded
 	int tableIndex;
 	int atbGauge = 0;
+
+	static int uidCounter;
 };
 
 #endif