Add GetWorld to Actor. Integrate google test. Add Model manager class. Rename *.h to *.hpp files

Core/Log/Log.hpp

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <string>
+
+void Log(const char* msg);
+void Log(const std::string& msg);
+
+void Message(const char* msg);
+void Message(const std::string& msg);