Added new textures for these blocks:
- Command Block
- Chain Command Block
- Repeating Command Block
- Test Instance Block
- Test Block (start mode)
- Test Block (log mode)
- Test Block (accept mode)
- Test Block (fail mode)
Some extra features:
- Impulse Command Blocks fade between orange and gold
- Chain Command Blocks fade between turquoise and cyan
- Repeating Command Blocks slowly flash light blue to indicate their function (repeating)
