v0.2 - now 100% UnrealPak-free!

• Now using repak for built-in pak writing
• Added CLI arg parsing (try --help)
• Still only supports rectangular prisms but you are allowed one single-axis rotation (doesn't handle multi-axis rotations yet, sorry)

v0.1 - extremely barebones

Supports untextured axis-aligned rectangular prisms. Anything else results in undefined behavior.