rename kinto.js to a better name

A better name for kinto.js should reference the fact that it is offline-first, based on IndexedDB, and/or provides the notion of adapters.

kinto-offline seems misleading and kinto-offline-first seems too long.

Any other ideas?

Review the naming criteria in the issue: the replacement should reflect offline-first behavior, IndexedDB, and/or adapters without being misleading or too long. Done means the project agrees on a new name; the payload names no files or tests to run.

Written by the indexing model from the issue text.