Returns header fields for protein (group) information.

def get_proteininfo_fields(poolnames=False, genecentric=False):
    """Returns header fields for protein (group) information."""
    allfields = OrderedDict()
    basefields = [peptabledata.HEADER_PROTEINS,
                  peptabledata.HEADER_GENES,
                  peptabledata.HEADER_ASSOCIATED,
                  peptabledata.HEADER_DESCRIPTIONS,
                  peptabledata.HEADER_COVERAGES,
                  peptabledata.HEADER_NO_CONTENTPROTEINS,
                  ]
    for field in basefields:
        allfields[field] = False
    allfields[peptabledata.HEADER_NO_PSM] = poolnames
    return allfields