Intro movie in sync with its sound, laptop GPU fix, builder UTF-8 fix

Every release includes all the fixes from the releases before it: always take the newest one. Includes everything from less-stutter.

• Intro movie in sync with its sound (#146, #179): the game showed one movie picture per frame, so whenever the frame rate dropped under 60 the picture fell behind and the sound ran ahead for the rest of the movie ("slow motion intro"). Pictures that fall behind are now skipped, so the movie keeps time with its sound.
• Laptops with two GPUs (#176): the game now asks the NVIDIA/AMD driver to run it on the dedicated GPU instead of the integrated one.
• Builder (#180): a translation step could stop on a character the console's code page can't show ("UnicodeEncodeError: 'charmap'"). Every step now writes UTF-8.

Still being worked on: missing leaves and grass (#35), low fps in busy scenes (CPU-bound), dark bars at the screen edges (#95, #145), black screen on a second start on some PCs (#195: please try the cache test in that issue), GPUs without mesh shaders (GTX 10xx, RX 5000).