Add unaligned memory module and halt behavior

Features

1. Should detect unaligned access
2. Gracefully halt after detection
3. Allow previous instructions to finish

Implementation

• Replace memory modules with aligned memory modules
• Hazard detection will signal an Emergency Stop if any module produces an error
• IFID will reset on emergency stop, thus propagating a halt through the pipeline

Possible problems

• The Decode module may check if IFID is resetting and ignore the halt (unconfirmed)