Zotero Parser breaks when trying to read a single page number.

[nischalsamji]

While loading a .rdf file, the zotero parser breaks.
Dataset provided on request.

The parser works well when a date range is proper as specified.

<bib:pages>S1-S12</bib:pages>

The parser breaks when there is a single page number.

<bib:pages>1001</bib:pages>

with the error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "zotero.py", line 181, in read
    papers = ZoteroParser(path).parse()
  File "t:\tethne\tethne\readers\base.py", line 279, in parse
    self.postprocess_entry()
  File "t:\tethne\tethne\readers\base.py", line 50, in postprocess_entry
    getattr(self, processor_name)(self.data[-1])
  File "zotero.py", line 136, in postprocess_pages
    start, end = entry.pages
ValueError: need more than 1 value to unpack

[nischalsamji]

@erickpeirson please tell me the expected behavior of the postprocess_pages() to fix the bug.

[erickpeirson]

postprocess_pages should set pageStart and pageEnd attributes, if data are available. A single page number should belong to pageStart, leaving pageEnd unset.