Lost Treasures - modifications for this site
Original: https://github.com/markusfisch/LostTreasures (commit 2f31e76e1f47744103707b05ddbf638271072cef)
Author: Markus Fisch. License: Unlicense (public-domain dedication, see UNLICENSE).

Changes:
1. preview.html (the unminified development page) was renamed to index.html. It loads only src.js from
   this folder; no other changes to the HTML.
2. src.js: in setPointer(), touches and clicks that land on a link are no longer cancelled, so the
   "Play again?" link after the last coin can be tapped on touch screens (marked with a
   "site fix" comment). Gameplay is unchanged.
3. Added LICENSE-gl-matrix.txt: the matrix helper functions in src.js (invert, multiply, rotate, scale,
   translate, transpose) are marked in the source as copied from gl-matrix by Brandon Jones and
   Colin MacKenzie IV, which is MIT licensed.
4. Added LICENSE, an identical copy of UNLICENSE, so the license file has a conventional name.
5. Not copied: gfx/ (Blender source file and an export helper), Makefile, squeeze.sh, README.md.

Note: createHeightMap() in src.js is marked by the author as based on Hunter Loftis's PlayfulJS
article "Realistic terrain in 130 lines" (http://www.playfuljs.com/realistic-terrain-in-130-lines/),
a tutorial of the standard diamond-square terrain algorithm. Credit is given here.