Packtools

* Minor refactoring to make possible for the XMLValidator to handle deprecated
versions of SciELO PS.
* Added basic support to SciELO PS 1.3.

* Fixed bug that would cause empty mandatory elements to be valid.

* Added feature to run the validation against an external schematron schema
[55].
* stylechecker's ``loglevel`` option accepts upper, lower or mixed case strings.
* stylechecker utility can read from stdin, so it can be a filter in unix
pipelines.
* Added ``raw`` option to stylechecker.
* Fixed bug that would raise UnicodeDecodeError in the presence
of any non-ascii character in the path to the file (Python 2 on Windows only).

* Fixed bug that would cause page counts to be reported as error when
pagination is identified with elocation-id [51].
* Added support for creative commons IGO licenses (sps-1.2 only).
* Fixed bug that would cause funding-group validation to raise false positives.

* Validating the minimum set of elements required for references of type
journal [http://git.io/vUSp6].
* Added validation of //aff/country/country attributes for XMLs under
sps-1.2 spec.

* Fixes a bug in which the occurrence of empty award-id,
fn[fn-type="financial-disclosure"] or ack could lead stylechecker to crash.