B.py

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* require to provide OAuth client ID and secret

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* fix missing ``labels`` header causing exception for WordPress service
* add note about ``$HOME/.local/bin`` in ``$PATH`` for user scheme installation

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* fix ``UnicodeDecodeError`` when filename with Unicode characters
* add ``-d``/``--debug`` for debugging messages
* show warning about ``stdout`` encoding not ``UTF-*``, and set ``errors`` to ``replace``

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* fix Blogger authentication warning on the deprecation of ``oauth2client.tools.run`` by switching_ to ``run_flow``.

.. _switching: https://github.com/pydata/pandas/issues/8327issuecomment-97282417

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* Makefile

* fix ``doc`` for ``CHANGES.rst`` prerequisite

* add ``embed_images`` configuration option to embed image files via data URI
scheme for all but text handler (pull request 2, by Adam Kemp)

* skip ``http``, ``https``, and ``data`` schemes
* if file not found, a message is printed out, rendered HTML tag is kept
untouched
* related doctest and unittest tests are added, testing ``embed_images``
function and with ``generate``, if with text handler, it will raise
``RuntimeError`` or treat ``img`` tag as plain text, respectively
* ``BaseHandler`` has class attribute ``SUPPORT_EMBED_IMAGES`` for subclass
to turn off the support as text handler utilizing it

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* Makefile

+ add ``test_doc8`` for doc8 test
+ add ``test_isort`` for import style check

* rename target ``install_test`` to ``test_setup``
* target ``test_setup``

+ add test for packages build
+ add test for ``LC_ALL=C``

+ add Python Wheel to build process

* add Blogger page draft support (15)

also simplify the post draft, both post and page use publish and revert
action to update post or page for the draft status