Refactor of structs

Refactored Size and Position
Placed them in different .h files

sources/Plansza.cpp

@@ -23,7 +23,7 @@ void Plansza::spawn_meteor() {
     }
 }
 
-Plansza::Size Plansza::getSize() {
+Size Plansza::getSize() {
     return size;
 }