Packtools

* Bugfix release
[https://github.com/scieloorg/packtools/commit/36a0277e].

* Added functions ``stylechecker.summarize`` and ``stylechecker.annotate``.
* Added zip-file validation capabilities.
* Initial support for SciELO PS 1.5.

* Fixes a bug that would cause ``country`` elements to be mandatory on
sub-articles of type ``transation``.
* HTMLGenerator().generate() method now handling undefined
``article/xml:lang`` attribute.

* Initial support for SciELO PS 1.4.

* Better debug information with ``stylechecker sysinfo`` option.
* Added scripts to handle registration of local xml catalog in the super catalog.
* New domain specific exceptions.
* The module ``packtools.xray`` was removed.
* Added support for automatic generation of HTML documents through
``HTMLGenerator``.
* Backwards incompatible change in ``XMLValidator`` init method signature.

* Fixe some issues that would cause invalid sps-1.3 XMLs to be considered valid.