Core/Game: Converted the game library to a shared library.

* There is still the possibility to static link against game.

src/server/game/AI/SmartScripts/SmartScript.h

@@ -28,7 +28,7 @@
 #include "SmartScriptMgr.h"
 //#include "SmartAI.h"
 
-class SmartScript
+class TC_GAME_API SmartScript
 {
     public:
         SmartScript();