Utility for merging level object lists for Sonic Adventure 1 and 2.

Typical usage pattern:

1. Create some objects using Cheat Engine
2. Export the object list as a SET file (Show Spawned Objects->Save->Save as type: Native SET format)
3. setmerge setXXXX_s.bin exported_file.bin setXXXX_s.bin to append to original object list
4. Added objects will now be a "permanent" part of the game.