The Biopython Consortium --> The Biopython Contributors

Discussed on mailing list in context of BOSC talk authorship.
This author description appears on our PyPI page:
https://pypi.python.org/pypi/biopython

See http://lists.open-bio.org/pipermail/biopython-dev/2014-April/011234.html
Merge branch 'master' of git://github.com/biopython/biopython into mmcif_parser