Librivox acquisition link should be hidden

[MarcCoquand]

Right now Librivox links are displayed as audio/mpeg. This is not really true, because when you click on the link you are shown a website (I.E. text/html).

So we should change the mediatype for Librivox books from audio/mpeg to text/html.

Expected

{
  "metadata": {
    "title": "Love and Freindship",
    "type": "http://schema.org/Book",
    "language": [
      "en"
    ],
    "author": [
      {
        "name": "Jane Austen",
        "links": [
          {
            "href": "https://openlibrary.org/authors/OL21594A",
            "type": "text/html",
            "rel": "author"
          }
        ]
      }
    ],
    "numberOfPages": 112
  },
  "links": [
    {
      "href": "https://openlibrary.org/opds/books/OL48596673M",
      "type": "application/opds-publication+json",
      "rel": "self"
    },
    {
      "href": "https://openlibrary.org/books/OL48596673M",
      "type": "text/html",
      "rel": "alternate"
    },
    {
      "href": "https://openlibrary.org/books/OL48596673M.json",
      "type": "application/json",
      "rel": "alternate"
    },
    {
      "href": "https://librivox.org/love-and-freindship-by-jane-austen-2",
      "type": "text/html",
      "rel": "http://opds-spec.org/acquisition/open-access",
      "title": "librivox",
      "properties": {
        "availability": "available"
      }
    },
    {
      "href": "https://archive.org/services/loans/loan/?action=webpub&identifier=loveandfreindship_2306_librivox&opds=1",
      "type": "application/opds-publication+json",
      "rel": "alternate",
      "properties": {
        "authenticate": {
          "href": "https://archive.org/services/loans/loan/?action=authentication_document",
          "type": "application/opds-authentication+json"
        }
      }
    },
  ],
  "images": [
    {
      "href": "https://covers.openlibrary.org/b/id/14373862-L.jpg",
      "type": "image/jpeg",
      "rel": "cover"
    }
  ]
}

Got

{
  "metadata": {
    "title": "Love and Freindship",
    "type": "http://schema.org/Book",
    "language": [
      "en"
    ],
    "author": [
      {
        "name": "Jane Austen",
        "links": [
          {
            "href": "https://openlibrary.org/authors/OL21594A",
            "type": "text/html",
            "rel": "author"
          }
        ]
      }
    ],
    "numberOfPages": 112
  },
  "links": [
    {
      "href": "https://openlibrary.org/opds/books/OL48596673M",
      "type": "application/opds-publication+json",
      "rel": "self"
    },
    {
      "href": "https://openlibrary.org/books/OL48596673M",
      "type": "text/html",
      "rel": "alternate"
    },
    {
      "href": "https://openlibrary.org/books/OL48596673M.json",
      "type": "application/json",
      "rel": "alternate"
    },
    {
      "href": "https://librivox.org/love-and-freindship-by-jane-austen-2",
      "type": "audio/mpeg",
      "rel": "http://opds-spec.org/acquisition/open-access",
      "title": "librivox",
      "properties": {
        "availability": "available"
      }
    },
    {
      "href": "https://archive.org/services/loans/loan/?action=webpub&identifier=loveandfreindship_2306_librivox&opds=1",
      "type": "application/opds-publication+json",
      "rel": "alternate",
      "properties": {
        "authenticate": {
          "href": "https://archive.org/services/loans/loan/?action=authentication_document",
          "type": "application/opds-authentication+json"
        }
      }
    },
  ],
  "images": [
    {
      "href": "https://covers.openlibrary.org/b/id/14373862-L.jpg",
      "type": "image/jpeg",
      "rel": "cover"
    }
  ]
}

[MarcCoquand]

This may automatically be solved with #46

[MarcCoquand]

Solve #46 first and then see if we should solve this too.