Overview
========
Extract metadata from PDF

    >>> from pprint import pprint
    >>> from eea.converter.tests.utils import get_filedata
    >>> from eea.converter.interfaces import IPDFMetadataParser
    >>> from zope.component import getUtility
    >>> parser = getUtility(IPDFMetadataParser)

    >>> inp = get_filedata('data/encrypted.pdf', as_string=False)
    >>> metadata = parser.parse(inp, password='password')
    >>> pprint(metadata)
    {...
     'creators': [u'Alin Voinea'...
    ...
     'producer': u'LibreOffice 4.4...}

    >>> inp = get_filedata('data/test.pdf', as_string=False)
    >>> metadata = parser.parse(inp)

    >>> pprint(metadata)
    {...
     'creators': [u'EEA/Frank Wugt Larsen', u'Adobe InDesign CC 2014 (Windows)'],
    ...
     'title': u'EU 2010 biodiversity baseline \u2014 adapted to the MAES typology (2015)'}
