Added a deprecation warning to the old style API.

This completes #121.

source/ManualBindings.cpp

@@ -892,6 +892,7 @@ static int tolua_cPluginManager_AddHook(lua_State * tolua_S)
 	else if (tolua_isusertype(S, ParamIdx, "cPlugin", 0, &err) && lua_isnumber(S, ParamIdx + 1))
 	{
 		// The next params are a cPlugin and a number, assume style 3 or 4
+		LOGINFO("cPluginManager.AddHook(): Deprecated format used, use cPluginManager.AddHook(HOOK_TYPE, CallbackFunction) instead. Fixing the call for you.");
 		return tolua_cPluginManager_AddHook_DefFn(PlgMgr, S, ParamIdx);
 	}