NES game support

This is the version that can be compiled with support for both the NES and the SNES versions of the game.

(The NES functionality has only been tested with the ROM file presented at archive.org. Using any other versions, including ones compiled from the disassembly, is untested and may result in incompatibility.)

Also, the Windows binaries have been compiled statically, so they no longer need extra libraries to run.