Postal-address

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* Keeps ``pycountry`` dependency to the 1.x series.

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* Replace dependency on ``fake-factory`` by ``Faker``.
* Add inactive unittests to highlight un-caught edge-cases in the country/state
normalization code on derivation from subdivisions. Refs 16.

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* Remove deprecated ``random_word()``, ``random_phrase()`` and
``random_postal_code()``.
* Activate tests on Python 3.3.
* Allow production of random chinese addresses.
* Bump ``faker`` requirement to 0.5.4.
* Activate tests on PyPy and PyPy3.

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* Add a new ``territory_children_codes()`` utility to fetch all children of a
territory.
* Use ``faker`` module to produce fuzzier random addresses.
* Deprecate ``random_word()``, ``random_phrase()`` and
``random_postal_code()`` in favor of ``faker`` module.
* Add ``isort`` configuration.
* Only allow string-like types to be set on editable address fields.
* Replace ``awesome-slugify`` dependency by ``boltons``.
* Activate tests on Python 3.5.

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* Switch from ``coveralls.io`` to ``codecov.io``.

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* Change license from GPLv2+ to BSD 2-Clause license. Closes 13.
* Add bumpversion configuration.
* Add custom PEP8 and PyLint configuration.