Refs #71. So apparently Elements actually evaluate to False... who knew?
Refs #71. Set all fields that were not passed in to their default, otherwise we see the tag definition from the class
Refs #71. Specify a default blank name
Refs #71. Added ParagraphProperties and vertical_align plus parent_style
Refs #71. Refactor
Refs #71. Replaced styles_dict with the Styles object
Refs #71. Added an "items" helper to make property merging easier
Refs #71. Resolve properties for run
Refs #71. Converted test case to a DocumentGenerator test case
Refs #71. Removed a deprecated test case
Refs #71. assertRaises context manager does not work in python 2.6
Refs #71. Byte strings don't support formatting operations