to-do.text

Review Deno run docs are correct. 
Should the binaries be actual binaries with `deno compile`?
Revise Atlas.fromJSON() to use fewer casts.
Explore an AtlasParser revive-based API instead parsing as JSON as a second pass.
Add FilmID argument support to atlas-pack executable.
Add a more thorough demo. For example, a very small game showcasing a few things: different collisioning (including Aseprite GUI screenshots of slices), tiling, different animations, parsing and image loading, a mini sprite / entity system.