Based on original script by Edward Keyes, ed-at-insani-dot-org, 2006-07-08, http://www.insani.org/tools/
and SmilingWolf, https://bitbucket.org/SmilingWolf/xp3tools-updated
Based on Python 3 rewrite, Awakening
Enhanced by Kiriha!
Extracts an .XP3 archive to a directory of files, and packs a directory of files into an .XP3 archive, including any subdirectory structure.
Uses Numpy (if available) to speed up decryption/encryption.
Adapt multiple encryption schemes, you can add your own encryption scheme easily!
Please see game_list.py for more information.