Add asset loading support.

src/dawn/game/game.c

@@ -11,6 +11,7 @@
 #include "display/display.h"
 #include "rpg/world/maps/testmap.h"
 #include "ui/textbox.h"
+#include "asset/asset.h"
 
 map_t MAP;
 game_t GAME;
@@ -21,6 +22,7 @@ void gameInit() {
   timeInit();
   inputInit();
   displayInit();
+  assetInit();
   textboxInit();
   
   testMapInit(&MAP);
@@ -62,5 +64,6 @@ void gameSetMap(map_t *map) {
 }
 
 void gameDispose() {
+  assetDispose();
   displayDispose();
 }