Street Rod 2 SDL3 port v0.1.0

First public build of the Street Rod 2 SDL3 port (Windows x64), v0.1.0.

Unzip sr2port-v0.1.0-win64.zip into a folder, put your installed game in a folder named Game next to the
files (or choose it in the launcher), then start Street Rod 2.exe (the launcher) or sr2port.exe. The original
game files are not included; you need your own copy of Street Rod 2: The Next Generation (1991).

Download	Mode	Needs from your game folder
sr2port-v0.1.0-win64.zip	VGA 320x200 (EGA shown as VGA), 16 colours; AdLib or PC speaker	SR.EXE, LIB1, LIB2, LIB3, SR2_DATA, SR2_SHP, SR2_END, MSR.SND, *.MUS

• A faithful C reimplementation of SR.EXE: the whole game, from the title through the classifieds, the garage,
  the gas station, Bob's Drive-In, bets and pink slips, all five race kinds, police, breakdowns, the summer
  calendar, saved games and the endings.
• Launcher (Street Rod 2.exe): game folder, graphics, sound (AdLib or PC speaker), the game's switches, window
  size and full screen; the keys of the game at a glance.
• Added: A / Z shift up and down in races.
• The game folder must be writable: saved games (HOTROD0.SAV ...) and the hall of fame are written there.
• Not in this release: CGA, Hercules and Tandy video.
• Open checks: the music gap of about 136 seconds after the title's first song; playtests are still running. Please
  report any difference from the original in the issues.

The zip includes SDL3.dll with libiconv-2.dll, and the launcher's wxWidgets DLLs with the libraries they load.
Their licences and sources are listed in licenses/THIRD-PARTY.txt. See the README for all differences from the
original.