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

Core/Game/Actors/Mesh/Mesh.cpp

@@ -1,6 +1,6 @@
 #include "Mesh.hpp"
 
-#include "Game/SaveMap/SaveMap.h"
+#include "Game/SaveMap/SaveMap.hpp"
 
 Mesh::Mesh()
 {

Core/Game/Actors/Mesh/Mesh.hpp

@@ -2,7 +2,7 @@
 
 #include <string>
 
-#include "../Actor.h"
+#include "../Actor.hpp"
 
 GENERATE_META(Mesh)
 class Mesh : public Actor