Log Message:
Update to 2014.12.29:

2014.12.29
==========
----

* Feature #51: Add single line break option.
    This feature is useful for ensuring that lots of extra line breaks do not
    end up in the resulting Markdown file in situations like Evernote .enex
    exports. Note that this only works properly if ``body-width`` is set
    to ``0``.