Alabaster Dawn Android port v0.5.1

v0.5.1

Fixes for running the game's Steam demo through the port, found by running it.

• The demo's Resolution menu named resolutions it does not render. The port rewrites the game's
  resolution ladder to add a 960x540 rung; the demo's bundle has no such ladder (its own is left
  alone, correctly), but the option labels were rewritten anyway — 1280x720 → 960x540 and
  1920x1080 → 1280x720. The two rewrites now move together: a build that does not use the
  release's ladder keeps its own truthful labels. The release build is unchanged.
• The demo no longer litters your saves folder. The demo-era engine builds its save paths
  Windows-style (\Saves\Default\); the bridge treated those as save-relative and SAF rewrote the
  illegal characters, creating _Saves_, _Saves_Default_, _Saves_Backups_, _Saves_Backups2_ in
  the folder you picked while the demo's own saves went nowhere. Both separators now resolve onto the
  same Saves/ layout, and mkdir is refused outside the save root like every other file call.
• Removed a dead branch in the resolution-option rewrite (it computed a default and returned the old
  text, so it never did anything).

Full release notes: docs/release-notes-0.5.1.md
Install, requirements and known limitations: README