Caterva

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* Fix invalid values for classifiers defined in `setup.py`.

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* Compile the package using scikit-build.

* Introduce a second level of multidimensional chunking.

* Complete API renaming.

* Support the buffer protocol and the numpy array protocol.

* Generalize the slicing.

* Make cat4py independent of numpy.

* Set the development status to alpha.

* Add instructions about installing cat4py from pip.

* `getitem` and `setitem` are now special methods in `ext.Container`.

* Add new class from numpy arrays `NPArray`.

* Support for serializing/deserializing Containers to/from serialized frames (bytes).

* The `pshape` is calculated automatically if is `None`.

* Add a `.sframe` attribute for the serialized frame.

* Big refactor for more consistent inheritance among classes.

* The `from_numpy()` function always return a `NPArray` now.

* Rename `MANINFEST.in` for `MANIFEST.in`.

* Fix the list of available cnames.

* Added a `MANIFEST.in` for including all C-Blosc2 and Caterva sources in package.

* Docstrings has been added. In addition, the documentation can be found at:
https://cat4py.readthedocs.io.

* Add a `copy` parameter to `from_file()`.

* `complib` has been renamed to `cname` for compatibility with blosc-powered packages.

* The use of an itemsize different than a 2 power is allowed now.