HedgeLib - Hedgehog Engine Archive Support (.ar/.arl/.pfd)

[Radfordhound]

We'll need code for:

• [X] Extracting Hedgehog Engine archives [e21ef448b89e929fe679558969e64f15b3bfaa4f]
• [ ] Reading Hedgehog Engine archive lists (.arl)
• [X] Creating new Hedgehog Engine archives [19b25e42c6d19109b6e6d1e9ad38d0ecab1cb0e6]

Decompressing the extracted data will be required as well. That'll come later, but it's not planned for June. See the following issues:

• CAB Support (for ARs within Generations PFDs on PC)
• XCompression Support (for files from Sonic Unleashed/Generations(?) on Xbox 360)
• SEGS Support (for files from Sonic Unleashed/Generations(?) on PS3)