Partial rewrite of server_application.cpp

I've also fixed some other issues along the way. However, the next step
requires support for multiple rooms. Finally.

server/character_manager.hpp

@@ -27,6 +27,7 @@
 #include "sqlite3/sqlite3.h"
 
 #include <map>
+#include <functional>
 
 class CharacterManager {
 public:
@@ -40,6 +41,8 @@ public:
 	void UnloadCharacter(int uid);
 	void DeleteCharacter(int uid);
 
+	void UnloadCharacterIf(std::function<bool(std::map<int, CharacterData>::iterator)> f);
+
 	//accessors and mutators
 	CharacterData* GetCharacter(int uid);
 	std::map<int, CharacterData>* GetContainer();