Add a MODS.json file for online Crackle Mod loader

[e016]

The format for the MODS.json file would be

[
    {
      "name": "Auto JS",
      "description": "Automatically, by default, enable JavaScript extensions.",
      "url": "auto-js.js",
      "version": "v1.0",
      "dependencies": []
    },
    {
      "name": "Better Flat Design",
      "description": "Makes flat design BETTER!",
      "url": "better-flat-design.js",
      "version": "v1.0.0",
      "dependencies": []
    },
    {
      "name": "Jameson Compatibility",
      "description": "Patch Snap! to support Jameson-only primitives. Does not include Jameson libraries.",
      "url": "jameson-compat.js",
      "version": "v1.2",
      "dependencies": []
    }
]