Cuttlebone 0.11.0

Milestone 11: a license, a release index, and requests from a client's
reports. Report.

• License: MPL-2.0, as Inko's. LICENSE is at the repository's root,
  and every release archive now holds it beside the compiler's
  LICENSE-MPL-2.0.
• A release index, index.json, with each release, and at
  releases/latest/download/index.json: every release's version, the
  Inko versions it has builds for, and its manifest's URL, so a client
  can find a build for an older Inko (docs/releases.md).
  The manifest is unchanged.
• Declaration errors by ids. An error in a declaration no longer
  refuses code that only mentions its name by another symbol's id: with
  an error in A.size's signature, a method that only calls B.size is
  answered.
• An import of a module that doesn't exist (noHir) is blank in the
  repaired copy, so the rest of the file is answered, fresh and
  repaired, even before any good check. A whole import now counts only
  the names it binds, not its path's leading ones.
• Definition at c.value += 1 answers the setter and the getter, as
  a Location[]. Every other position still answers one Location.
• Saving keeps kept checks. A save (in place, or by renaming a new
  file over the old) no longer makes the next question a whole check.
• References at a declaration outside the project (std's, or a
  dependency's in dep/) answer the project's uses, instead of
  noHir or the declaring library's own.

Each archive works with one Inko version, which its name says.
Machine-readable list of the builds, with sizes and SHA-256:
https://github.com/setdef/Cuttlebone/releases/download/v0.11.0/manifest.json
Every release, with its Inko versions and manifest:
https://github.com/setdef/Cuttlebone/releases/latest/download/index.json
(docs/releases.md).