Minimal biom file to demonstrate [a bug](https://github.com/PitchInteractiveInc/Phinch/issues/73) in Phinch.

phinchFilterBug.biom

{
    "id": "No Table ID",
    "format": "Biological Observation Matrix 2.1.0",
    "format_url": "http://biom-format.org",
    "matrix_type": "sparse",
    "generated_by": "BIOM-Format 2.1",
    "date": "2017-04-11T17:40:40.014828",
    "type": "OTU table",
    "matrix_element_type": "float",
    "shape": [3, 3],
    "data": [[0,0,100],[1,1,100],[2,2,100]],
    "rows": [
        {"id": "OTU_1", "metadata": {"taxonomy": ["k__animalia"]}},
        {"id": "OTU_2", "metadata": {"taxonomy": ["k__fungi"]}},
        {"id": "OTU_3", "metadata": {"taxonomy": ["k__plantae"]}}
    ],
    "columns": [
        {"id": "Sample_1", "metadata": {"works": "A", "does_not_work": "X"}},
        {"id": "Sample_2", "metadata": {"works": "B", "does_not_work": "Y"}},
        {"id": "Sample_3", "metadata": {"works": "C", "does_not_work": "Z"}}
    ]
}