- update to 1.17.4:
* 4th bugfix release over 1.17, which provided these highlights:
**Added** extended language support for annotations and widgets: a mixture of
Latin, Greece, Russian, Chinese, Japanese and Korean characters can now be
used in 'FreeText' annotations and text widgets. No special arrangement is
required to use it.
* Faster page access is implemented for documents supporting a "chapter"
structure. This applies to EPUB documents currently. This comes with several
new :ref:`Document` methods and changes for :meth:`Document.loadPage` and the
"indexed" page access *doc[n]*: In addition to specifying a page number as
before, a tuple *(chaper, pno)* can be specified to identify the desired
page.
* **Changed:** Improved support of redaction annotations: images overlapped by
redactions are **permanantly modified** by erasing the overlap areas. Also
links are removed if overlapped by redactions. This is now fully in sync with
PDF specifications.