Pushjack

-------------------

- gcm: Add ``restricted_package_name`` and ``dry_run`` fields to GCM sending.
- gcm: Add exceptions for all GCM server error responses.
- apns: Make ``apns.get_expired_tokens`` and ``APNSClient.get_expired_tokens`` accept an optional ``sock`` argument to provide a custom socket connection.
- apns: Raise ``APNSAuthError`` instead of ``APNSError`` if certificate file cannot be read.
- apns: Raise ``APNSInvalidPayloadSizeError`` instead of ``APNSDataOverflow``. (**breaking change**)
- apns: Raise ``APNSInvalidTokenError`` instead of ``APNSError``.
- gcm: Raise ``GCMAuthError`` if ``GCM_API_KEY`` is not set.
- pushjack: Rename several function parameters: (**breaking change**)

- gcm: ``alert`` to ``data``
- gcm: ``token``/``tokens`` to ``registration_id``/``registration_ids``
- gcm: ``Dispatcher``/``dispatcher`` to ``GCMRequest``/``request``
- Clients: ``registration_id`` to ``device_id``

- gcm: Return ``GCMResponse`` object for ``GCMClient.send/send_bulk``. (**breaking change**)
- gcm: Return ``requests.Response`` object(s) for ``gcm.send/send_bulk``. (**breaking change**)

-------------------

- apns: Fix payload key assigments for ``title-loc``, ``title-loc-args``, and ``launch-image``. Previously, ``'_'`` was used in place of ``'-'``.

-------------------

- apns: Fix incorrect variable reference in ``apns.receive_feedback``.

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- pushjack: Fix handling of ``config`` in clients when ``config`` is a class object and subclass of ``Config``.
- apns: Make ``apns.send/send_bulk`` accept additional ``alert`` fields: ``title``, ``title-loc``, ``title-loc-args``, and ``launch-image``.
- gcm: Make ``gcm.send/send_bulk`` raise a ``GCMError`` exception if ``GCM_API_KEY`` is not set.
- gcm: Make gcm payload creation cast ``data`` to dict if isn't not passed in as one. Original value of ``data`` is then set to ``{'message': data}``. (**breaking change**)
- gcm: Make gcm payload creation not set defaults for optional keyword arguments. (**breaking change**)

-------------------

- pushjack: Rename ``pushjack.settings`` module to ``pushjack.config``. (**breaking change**)
- apns/gcm: Allow config settings overrides to be passed into ``create_gcm_config``, ``create_apns_config``, and ``create_apns_sandbox_config``.
- pushjack: Override ``Config``'s ``update()`` method with custom method that functions similarly to ``from_object()`` except that it accepts a ``dict`` instead.

-------------------

- First release.


.. _Brad Montgomery: https://github.com/bradmontgomery
.. _Julius Seporaitis: https://github.com/seporaitis
.. _Ahmed Khedr: https://github.com/aakhedr
.. _Jakub Kleň: https://github.com/kukosk
.. _Lukas Anzinger: https://github.com/Lukas0907
.. _Tanner Stirrat: https://github.com/tstirrat15