Archive version control

Version 3

From application version 1.3.3

• Compression added to archives (does not compress if file specified)
• Checksum changed to XXHash (for fast hashing)
  • Backward compatibility maintained, all other archives can be restored

Version 2

From application version 1.1.5

• Added more comprehensive metadata

Version 1

• First archive. No metadata.
• Checksum SHA256