IronCore v0.2.2

Changed

• The PyPI distribution is named ironcore-cli. PyPI refused the bare name
  ironcore as "too similar to an existing project" — its similarity guard
  collapses separators, so the unrelated iron-core (Iron.io API wrappers)
  occupies the same slot. Only the distribution name moved: the console script
  is still ironcore, the import package is still ironcore, the repository is
  still IronCore, and no code changed. pip install ironcore-cli then
  ironcore doctor. This is the first version published to PyPI; 0.2.1 and
  earlier are installable from the GitHub releases and from source.