Create latest.json in /dist/

[phillipj]

An issue on nodejs.org has been raised nodejs/nodejs.org#342 about exposing a straight-forward way to find the current LTS and Stable versions, instead of parsing /dist/index.json and re-implementing the logic we've got on nodejs.org.

Could we create latest.json alongside the index.json in https://nodejs.org/dist/? E.g:

{
  "lts": {
    "version": "v4.2.1",
    "date": "2015-10-13",
    "files": [ .. ],
    "npm": "2.14.7",
    "v8": "4.5.103.35",
    "uv": "1.7.5",
    "zlib": "1.2.8",
    "openssl": "1.0.2d",
    "modules": "46",
    "lts": "Argon",
    "name": "Node.js",
    "url": "https://nodejs.org/download/release/v4.2.1/"
  },
  "stable": {
    "version": "v5.0.0",
    "date": "2015-10-29",
    "files": [ .. ],
    "npm": "3.3.6",
    "v8": "4.6.85.28",
    "uv": "1.7.5",
    "zlib": "1.2.8",
    "openssl": "1.0.2d",
    "modules": "47",
    "lts": false,
    "name": "Node.js",
    "url": "https://nodejs.org/download/release/v5.0.0/"
  }
}

Please correct me if I'm missing something here @martinheidegger.

[martinheidegger]

LGTM (thank you for being patient with me)

[rvagg]

See my comments at nodejs/nodejs.org#342 (comment)

[phillipj]

Closing this it got down voted in nodejs/nodejs.org#342.