DevLog #6: Item improvements and bug fixes

Some minor improvements and modifications:

• Refactored and exposed the items configuration file and sprites, similarly to the tiles.
• Modified the tiles configuration so items are referenced by tag instead of id.
• Removed the burlap sack when multiple items where on the same tile, now every individual item type is rendered.
• Corrected bug that prevented tile rotation when pressing R (Currently only the Log Wall can rotate)