'GET /api/genomes/{id}
Returns information about build <id>'

@web.json
def show(self, trans, id, num=None, chrom=None, low=None, high=None, **kwd):

    id = get_id(id, kwd.get('format', None))
    reference = is_true(kwd.get('reference', False))
    rval = None
    if reference:
        region = self.app.genomes.reference(trans, dbkey=id, chrom=chrom, low=low, high=high)
        rval = {'dataset_type': 'refseq', 'data': region.sequence}
    else:
        rval = self.app.genomes.chroms(trans, dbkey=id, num=num, chrom=chrom, low=low)
    return rval
