Static-frame

Added ``to_zip_npy()`` and ``from_zip_npy()`` interfaces to ``Bus``, ``Batch``, ``Yarn``, and ``Quilt``.

Added ``test_example_gen.py`` to test and enforce automatic example generation.

Improved usage of ``__slots__`` throughout.

Continuous integration quality checks now using pylint 2.15.0 and isort 5.10.1

ErrorNPYEncode`` exceptions raised during authoring NPZ files or NPY directories now remove those files or directories.

``ErrorNPYEncode`` exceptions raised during ``to_zip_npz()`` now remove the archive.

Authoring NPYs to a pre-existing directory will now raise a ``RuntimeError``.

Supplying an ``IndexDatetime`` subclass as an ``explicit_constructor`` to an ``IndexAutoFactory`` now raises.

Corrected issue with ``fillna`` and ``fillfalsy`` functions when non-elemental fill values are supplied.

Updated ``arraykit`` to 0.1.13.

Corrected single depth selection issue with ``IndexHierarchy``.

Updated ``arraykit`` to 0.1.12.

Set minimum ``numpy`` to 1.18.5.

Added ``index_constructors`` parameter to ``Frame.relabel_shift_in()``.

Corrected issue when ``Frame.astype()`` called with an empty ``Frame``.

Extended ``via_values`` property to take optional consolidation arguments via ``__call__()`` constructor; usage of ``via_values`` instance returns same-typed, same-sized container.

Added ``via_values`` property to ``Series``, ``Index``, ``Frame``, ``IndexHierarchy`` and ``Batch``; permits applying functions to complete containers with ``apply()`` and supports usage as arguments in arbitrary NumPy functions with ``__array_ufunc__()``.

Corrected usage of ``IterNodeDelegate`` with iterator endpoints that do not iterate hashables; added ``IterNodeDelegateMapable`` for usage with iterators of hashables.

Improved type and dtype preservation in concatenation and set operations on ``IndexHierarchy``.

Normalized ordering of results from ``Frame.bloc[]`` selections to row-major ordering without sorting labels.

Added ``via_str.contains()``.

Corrected issue in ``ArchiveZIP`` when ``__del__`` is called when no archive is set.

``Frame.to_sqlite()`` now requires a named ``Frame`` or an explicit ``label``; ``Frame.from_sqlite()``, ``Frame.from_hdf5()`` now make ``label`` a required argument.

API Documentation re-organized, now using procedurally generated code examples.