Fix anomalous backslash in string.
Remove unused variable.
Remove an XXX.
More XXXs gone.
Refactor bibliography cache setting and getting.
Simplify code by refactoring bibliographies attribute; made it private.
Rename local variable for clarity.
A pep8 fix.
Remove irrelevant comment.
Further refactor of BibliographyTransform.apply.
Final refactor of transform.
Fix pep8 issue.
Remove unneeded code.
More pylint naming fixes.
Move method to function.
Remove FilterVisitor from public API.
Update documentation and changelog.
Add missing docstring.
Use namedtuple for BibfileCache.
Use namedtuple for BibliographyCache.