Special case 'index.js' to default to '/'

[totherik]

With the new routing rules, the file name is used as part of the path. Unfortunately, the convention of using an index.js file in a directory somewhat breaks that behavior, or at least makes it unexpected. This issue proposed to special-case index.js to default to '/' instead of '/index', such that it can be used as the root for that particular path, matching the behavior in Node.js.

[totherik]

Fixed with PR #26