Static-frame

Corrected issue where summing a ``Frame`` of Booleans along axis 0 resulted in Booleans instead of integers.

Performance enhancements to ``Frame.iter_group()`` and ``Frame.iter_group_items()``.

Added ``Frame.to_npz()``, ``Frame.from_npz()``

Performance enhancements to ``Frame.iter_group()`` and ``Frame.iter_group_items()``.

Performance enhancements to ``Frame.pivot()``.

Added ``drop`` parameter to ``Frame.iter_group()`` and ``Frame.iter_group_items()``.

Introduction of ``TypeBlocks._block_slices`` as lazily derived and persistently stored.

Fixed issue with ``Frame.from_overlay`` when called with ``FrameGO``.

Added ``index_constructor`` argument to ``apply``, ``apply_pool``, ``map_any``, ``map_fill``, ``map_all``.

Added ``dtypes`` parameter to ``Frame.from_pandas()``.

Added ``index_constructors``, ``columns_constructors`` to the following interfaces: ``Frame.from_sql()``, ``Frame.from_structured_array()``, ``Frame.from_delimited()``, ``Frame.from_csv()``, ``Frame.from_clipboard``, ``Frame.from_tsv()``, ``Frame.from_xlsx()``, ``Frame.from_sqlite()``, ``Frame.from_hdf5()``, ``Frame.from_arrrow()``, ``Frame.from_parquet()``.

``StoreConfig`` now exposes ``index_constructros`` and ``columns_constructors`` arguments.

Incorrectly formed ``Batch`` iterables will now, upon iteration, raise a ``BatchIterableInvalid`` exception.

Added ``Quilt.sample()``.

``all()`` and ``any()`` on ``Series`` and ``Frame`` no longer raise when NA values are present and ``skipna`` is ``False``.

Performance enhancements to ``Bus`` loading routines when using ``max_persist`` by refactoring internal architecture of ``Bus`` to no longer hold a reference to a ``Series`` but instead use a mutable array.

Optimization of ``Bus.items()``, ``Bus.values``, ``Bus.iter_element()``, and ``Bus.iter_element_items()`` when ``max_persist`` is greater than one.

Added ``Yarn.iter_element()``, ``Yarn.iter_element_items()``.

Added ``Yarn.drop[]``

Added ``Yarn.reindex()``, ``Yarn.relabel_flat()``, ``Yarn.relabel_level_add()``, ``Yarn.relabel_level_drop()``, ``Yarn.rehierarch()``.

Added ``Bus.unpersist()``, ``Yarn.unpersist()``, and ``Quilt.unpersist()``.

Improvements to standard string representation of ``Quilt``.

Added ``is_month_start()``, ``is_month_end()``, ``is_year_start()``, ``is_year_end()``, ``is_quarter_start()``, ``is_quarter_end()`` to ``via_dt`` interfaces.

Added ``hour``, ``minute``, ``second`` properties to ``via_dt`` interfaces.

Improved implementation of ``weekday()``, added ``quarter()`` to ``via_dt`` interfaces.

Fixed issue when using ``iter_window_*`` methods on two-dimensional containers where the opposite axis is not a default index constructor.

Fixed issue when selecting rows from ``Frame`` with 0-length columns.

Implementation of ``Yarn``, a container that presents numerous ``Bus`` as a uniform, 1D interface.

Fixed issue in ``Frame.astype[]`` when selecting targets with a Boolean ``Series`` or arrays.

Fixed unnecessary type coercion in the ``Frame`` returned by ``Frame.drop_duplicated()``.

Improved handling of reindexing and lookups between datetime64 and date / datetime objects.

``Frame.equals()``, ``Series.equals()``, ``Index.equals()``, ``IndexHiearchy.equals()`` and all related routines now distinguish by ``datetime64`` unit in evaluating basic equality.