Metacello 1.0-beta.26.1 released

Metacello 1.0-beta.26.1 released. Features:
  - fix and test coverage for bug involving a postload doit with
    linear load nested inside an  atomic load
  - when loading a project reference, do not load mcz files that are
    older than the currently loaded mcz files (implicit version
    request). Older files will be loaded if directly referenced
    from the project being loaded (explicit version request).
  - add RETRY logic to handle HTTP droppage

This is a bugfix release.

Dale