Metal Empire

1. Added Master Key and Chest Exterminator.

2. Vanilla chests was changed:
2.1 Can be opened only with a Master Key.
2.2 Can't be crafted.
2.3 Can be broken only with a Chest Exterminator.

3. Mod Info was fixed.

4. Added 11 boxes for storing items:
4.1 6 boxes with a capacity of 4 slots.
4.2 Other boxes with a capacity of 9, 18, 27, 36, 45 slots accordingly.