Test Drive (1987) - SDL3 port 0.3.0

1. Put the original DOS Test Drive files in a folder named "Game" next to tdport.exe: TDEGA.EXE and the *.PES
   files (EGA), and/or TDCGA.EXE and the *.CMP files (CGA, Hercules), with CARS.TXT, SCORES, TDSND.SND and the
   car *.BIN / *.SS files. For the Amiga version, put the Amiga disk image (.adf) in a folder named
   "Game Amiga". Nothing of the original game is included here.
2. Run "Test Drive.exe" to choose the version, options and keys and press Play,
   or run tdport.exe, tdport-cga.exe, tdport-herc.exe or tdport-amiga.exe directly.
3. Keep the folder writable: high scores are saved in "Game" and beside the Amiga disk image.

Options, controls and what is different from the original: README.md and CHANGELOG.md.
