Add institution: UoExeter

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Data submitted by @znicholls

Adding the following new data.

{
    "@id": "mip-cmor-tables:organisations/institutions/uoexeter",
    "@type": "institution",
    "acronyms": [],
    "aliases": [],
    "cmip_acronym": "UoExeter",
    "established": 1955,
    "kind": "Education",
    "labels": [],
    "location": {
        "@id": "mip-cmor-tables:organisations/institutions/location/03yghzc09",
        "@type": "location",
        "@nest": {
            "lat": 50.7236,
            "lon": 50.7236,
            "city": "Exeter",
            "country": [
                "United Kingdom",
                "GB"
            ]
        }
    },
    "name": "University of Exeter",
    "ror": "03yghzc09",
    "url": [
        "http://www.exeter.ac.uk/"
    ]
}

Resolves #60