Afegides descripcions a algunes classes

Eliminats parámetres no necesaris als constructors de classes

source/tiledbg.cpp

@@ -1,11 +1,10 @@
 #include "tiledbg.h"
 
 // Constructor
-Tiledbg::Tiledbg(SDL_Renderer *renderer, Screen *screen, Asset *asset, SDL_Rect pos, int mode)
+Tiledbg::Tiledbg(SDL_Renderer *renderer, Asset *asset, SDL_Rect pos, int mode)
 {
     // Copia los punteros
     this->renderer = renderer;
-    this->screen = screen;
     this->asset = asset;
     this->pos = pos;
     this->mode = mode;