Sciris

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1. ``sc.parallelize()`` now explicitly deep-copies objects, since on some platforms this copying does not take place as part of the parallelization process.

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1. ``sc.search()`` is a new function to find nested attributes/keys within objects or dictionaries.

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1. ``sc.Blobject`` has been modified to allow more flexibility with saving (e.g., ``Path`` objects).

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1. ``sc.mprofile()`` has been added, which does memory profiling just like ``sc.profile()``.
2. ``sc.progressbar()`` has been added, which prints a progress bar.
3. ``sc.jsonpickle()`` and ``sc.jsonunpickle()`` have been added, wrapping the module of the same name, to convert arbitrary objects to JSON.
4. ``sc.jsonify()`` checks objects for a ``to_json()`` method, handling e.g Pandas dataframes, and falls back to ``sc.jsonpickle()`` instead of raising an exception for unknown object types.
5. ``sc.suggest()`` now uses ``jellyfish`` instead of ``python-levenshtein`` for fuzzy string matching.
6. ``sc.saveobj()`` now uses protocol 4 instead of the latest by default, to avoid backwards incompatibility issues caused by using protocol 5 (only compatible with Python 3.8).
7. ``sc.odict()`` and related classes now raise ``sc.KeyNotFoundError`` exceptions. These are derived from ``KeyError``, but fix a `bug in the string representation <https://stackoverflow.com/questions/34051333/strange-error-message-printed-out-for-keyerror>`__ to allow multi-line error messages.
8. Rewrote all tests to be pytest-compatible.

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1. ``sc.makefilepath()`` now has a ``checkexists`` flag, which will optionally raise an exception if the file does (or doesn't) exist.
2. ``sc.sanitizejson()`` now handles ``datetime.date`` and ``datetime.time``.
3. ``sc.uuid()`` and ``sc.fast_uuid()`` now work with non-integer inputs, e.g., ``sc.uuid(n=10e3)``.
4. ``sc.thisdir()`` now accepts additional arguments, so can be used to form a full path, e.g. ``sc.thisdir(__file__, 'myfile.txt')``.
5. ``sc.checkmem()`` has better parsing of objects.
6. ``sc.prepr()`` now lists properties of objects, and has some aesthetic improvements.