Add ENH_3D_INVENTORY_TILES

Replaces the functionality of gui_blocks.png by actually 3D rendering inventory item tiles.

GameMods.hpp

@@ -28,6 +28,7 @@
 #define ENH_USE_GUI_SCALE_2     // Use a 2x GUI scale instead of 3x. Looks better on PC
 #define ENH_ALLOW_SCROLL_WHEEL  // Allow use of the scroll wheel to change selected inventory slots
 #define ENH_DISABLE_TURN_ACCEL  // Disable the turn acceleration mechanism. It should only be used on Xperia Play
+#define ENH_3D_INVENTORY_TILES  // Uses 3D rendered inventory tiles, use with ENH_SHADE_HELD_TILES to render correctly.
 
 // Mods
 //#define MOD_USE_FLAT_WORLD         // Use a flat world instead of the regular world generation