Pokémon X native viewer demo

Requirements:
  - 64-bit Linux
  - SDL2 runtime libraries

Run the self-contained synthetic demo:
  ./bin/pokemon_asset_viewer --demo
  ./bin/pokemon_model_viewer --demo
  ./bin/pokemon_field_viewer --demo
  ./bin/pokemon_slice --demo

To inspect locally extracted game data, pass --romfs /path/to/romfs to the
viewer described in the project documentation. This release does not include
Nintendo game files or extracted game assets.
