modern_kanto 0.2.0

0.1.0 did nothing at all. Update. It threw on its first line and
registered none of its five options, neither of its two patches, and not the
Atlas screen. If you installed it, you were running vanilla.

• Fixed: the mod never ran. main.lua opened with
  require("data.split"), and a mod-relative require does not resolve —
  the engine loads a mod's entry file itself, and package.path still points
  at the engine root, so data.split is looked for beside main.lua
  nowhere. All four modules are inlined into main.lua; the mod now has no
  require of its own beyond engine modules.
• Fixed: the test suite could not see that. It dofile'd the library
  files directly, so it tested code the mod had never loaded. It now goes
  through the loader and asserts the registrations — options defined, screen
  registered, screen opens — and refuses to run against a disabled mod.
  Two further holes it now closes: the mod is experimental, so the loader
  leaves it off until the player opts in, which made #errors == 0 true and
  meaningless; and the type-chart assertions read the chart after GHOST FIX
  had rewritten it, checking the mod's output against itself.

No behaviour was intentionally changed. Everything below is what 0.1.0
described and now actually does.