Static-frame

Updated all delimited text output formats to include a final line termination.

``Frame.from_overlay`` now takes optional ``index`` and ``columns`` arguments; ``Series.from_overlay`` now takes an optional ``index`` argument.

Improvements to union/intersection index formation in ``Frame.from_overlay`` and ``Series.from_overlay``.

Performance improvements to ``Frame.pivot``.

``Frame.from_xlsx`` now exposes ``skip_header`` and ``skip_footer`` parameters.

Added ``Frame.from_overlay``, ``Series.from_overlay`` constructors.

Added support for ``dataclass`` as records in ``Frame.from_records`` and ``Frame.from_records_items``.

Additional delegated ``Frame`` methods added to ``Batch``.

Fixed issue when loading pickled containers where Boolean selection would not be properly identified.

Added ``via_dt.fromisoformat()`` to all containers, supporting creation of date/datetime objects from ISO 8601 strings.

``Batch.to_frame`` now returns a `Frame` with an `IndexHierarchy` if all ``Batch`` operations retain one or more ``Frame``.

``Batch`` interface extended with core ``Frame`` methods.

Restored parameter name in ``Series.relabel`` to be ``index``.

Support for writing date, datetime, and np.datetime64 via `Frame.to_xlsx`.

Exposed ``store_filter`` parameter in ``Frame.from_xlsx``,``Frame.to_xlsx``.

Removed ``format_index``, ``format_columns`` attributes from ``StoreConfig``.

Fixed issue in ``Series.drop`` when the ``Series`` has an ``IndexHierarchy``.

Calling ``Frame.from_series`` with something other than a ``Series`` will now raise.

Calling ``Index.from_pandas``, ``Series.from_pandas``, and ``Frame.from_pandas`` now raise when given a non-Pandas object.

``StoreConfig`` given to ``Bus.to_xlsx``, ``Bus.to_sqlite``, and ``Bus.to_hdf5`` are now properly used.