- fixes for some threading shutdown bugs

- We now display when a screenshot is taken in game showing an ingame console message
- Updated AI to attack closest attackers
- Updated found enemy to be closest attacker

source/shared_lib/include/platform/common/simple_threads.h

@@ -125,13 +125,13 @@ protected:
 
 public:
 	LogFileThread();
+	virtual ~LogFileThread();
     virtual void execute();
     void addLogEntry(SystemFlags::DebugType type, string logEntry);
     std::size_t getLogEntryBufferCount();
+    virtual bool canShutdown(bool deleteSelfIfShutdownDelayed=false);
 };
 
-
-
 }}//end namespace
 
 #endif