Bug 901622 - Part 1: Update licenses, add newline at EOF.
Bug 901622 - Part 2: Bump ProfileInformationCache version to invalidate cache.
Bug 901622 - Review comment: Add comment on why fromJSON refuses to load old versions.
Bug 901622 - Review comment/followup: Divide up restore tests; add explicit oldVersion test.
Bug 901622 - Review comment: Add version history comment.
Bug 901622 - Invalidate ProfileInformationCache by bumping version. r=rnewman