Static-frame

Introduced the ``Bus``, a ``Series``-like container of mulitple ``Frame``, supporting lazily reading from and writing to XLSX, SQLite, and HDF5 data stores, as well as zipped pickles and delimited files.

Added ``interface`` attribute to all containers, providing a hierarchical presentation of all interfaces.

Added ``display_tall()`` and ``display_wide()`` convenience methods to all containers.

Added ``label_widths_at_depth()`` on ``Index`` and ``IndexHierarchy``.

Added ``Series.from_concat_items()`` and ``Frame.from_concat_items()``.

Added ``Frame.to_xarray()``.

Added ``Frame.to_xlsx()``, ``Frame.from_xlsx()``.

Added ``Frame.to_sqlite()``, ``Frame.from_sqlite()``.

Added ``Frame.to_hdf5()``, ``Frame.from_hdf5()``.

Added ``Frame.to_rst()``.

Added ``Frame.to_markdown()``.

Added ``Frame.to_latex()``.

The interface of ``Frame.from_delimited`` (as well as ``Frame.from_csv`` and ``Frame.from_tsv``) has been updated to conform to the common usage of ``index_depth`` and ``columns_depth``. IndexHierarchy is now supported when ``index_depth`` or ``columns_depth`` is greater than one. The former parameter ``index_column`` is renamed ``index_column_first``.

Added ``IndexHierarchy.from_index_items`` and ``IndexHierarchy.from_labels_delimited``.

Added ``IndexBase.names`` attribute to provide normalized names equal in length to depth.

The ``DisplayConfig`` parameter ``type_show`` now, if False, hides, native class types used as headers. This is the default display for all specialized string output via ``Frame.to_html``, ``Frame.to_rst``, ``Frame.to_markdown``, ``Frame.to_latex``, as well as Jupyter display methods.

Added ``Frame.unset_index()``.

Added ``Frame.pivot()``.

Added ``Frame.iter_window``, ``Frame.iter_window_items``, ``Frame.iter_window_array``, ``Frame.iter_window_array_items``.

Added ``Series.iter_window``, ``Series.iter_window_items``, ``Series.iter_window_array``, ``Series.iter_window_array_items``.

Added ``Frame.bloc`` and ``Frmae.assign.bloc``

Added ``IndexHierarchy.rehierarch``, ``Series.rehierarch``, and ``Frame.rehierarch``.

Defined ``__bool__`` for all containers, where the result is determined based on if the underlying NumPy array has ``size`` greater than zero.

Improved ``Frame.to_pandas()`` to preserve columnar types.

``Frame.set_index_hierarchy`` now accepts a ``reorder_for_hierarchy`` argument, reordering the rows to support hierarchability.

Added ``Frame.from_dict_records`` and ``Frame.from_dict_records_items``; when given records, the union of all keys is used to derive columns.

Fixed issues in ``FrameGO`` setitem and using binary operators between ``Frame`` and ``FrameGO``.

Corrected flaw in axis 1 statistical operations with ``Frame`` constructed from mixed sized ``TypeBlocks``.

Added ``Series.loc_min``, ``Series.loc_max``, ``Series.iloc_min``, ``Series.iloc_max``.

Added ``Frame.loc_min``, ``Frame.loc_max``, ``Frame.iloc_min``, ``Frame.iloc_max``,

iter_element().apply`` now properly preserves index and column types.

Using ``Frame.from_records`` with an empty iterable or iterator will deliver a ``ErrorInitFrame``.

Matrix multiplication implemented for ``Index``, ``Series``, and ``Frame``.

Added ``Frame.from_records_items`` constructor.

Improved dtype selection in ``FrameGO`` set item and related functions.

``IndexHierarchy.from_labels`` now accepts an ``index_constructors`` argument.

``Frame.set_index_hierarchy`` now accepts an ``index_constructors`` argument.

``IndexHierarhcy.from_product() now attempts to use ``name`` of provided indicies for the ``IndexHierarchy`` name, when all names are non-None.

Added ``IndexHierarchy.dtypes`` and ``IndexHierarchy.index_types``, returning ``Series`` indexed by ``name`` when possible.