Pyluach

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* Fixed mistakes in docstring and error message.

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* Added parameter `include_working_days` to ``festival`` method and function.
* Removed support for python < 3.6

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* Added option to get parsha in Hebrew.
* Added ``dates.HebrewDate`` methods to get hebrew day, month, year, and
date string in Hebrew.
* Added method to get ``hebrewcal.Month`` names in Hebrew.
* Added methods to get year and month strings in Hebrew.
* Added classmethods to ``hebrewcal.Year`` and ``hebrewcal.Month`` to get
objects from dates and pydates.
* Added methods to dates classes to get holidays, fast days and festivals.
* Implemented more consistent Hebrew to English transliterations for parshios.

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* Fixed molad having weekday of ``0`` when it should be ``7``.

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* Created ``isoweekday`` method for all date types in the ``dates`` module.
* Created fast_day and festival functions (`11`_)
* Added Pesach Sheni to festival.

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* Fixed error getting parsha of Shabbos on Rosh Hashana.