Simple JSON directory listing

gistfile1.js

{

  label: "files",

  children: [

    {
      label: "images",
      children: [

        {
           label: "asdf.png",
           mimeType: "image/png"
        },
        {
           label: "hjkl.png",
           mimeType: "image/png"
        }
      ]
    },

    {
      label: "README",
      mimeType: "text/plain"
    }
  ]
}