v0.6.1

Fixed

• The package description on PyPI now describes the current package. It had not been updated
  since 0.3.0, so it listed none of the features added in 0.4.0, 0.5.0 or 0.6.0: not the drop to
  NumPy as the only dependency, not save_npz/load_npz, not the training reports, and not the
  scikit-learn estimator interface that 0.6.0 exists to add.

  A PyPI description cannot be edited after upload, so correcting it takes a release. That is the
  whole of this one: no code changed, and results are identical to 0.6.0.

  The upgrade notes were also short of two things worth knowing. 0.4.0 changes
  linear-initialization results for data far from the origin, where the previous PCA path was wrong
  by up to 5.8%, and it removed pandas and scikit-learn as runtime dependencies, which matters to
  anyone who was importing either transitively. Both are now in the README, alongside a note that 0.5.0's
  string deprecation was withdrawn so anyone who saw the warning knows to stop migrating.