Changes

<td><code>local id = specification.id or "BookId"</code><br /><code>package = format(package,id,id,concat(used,"\n"),file.removesuffix(root))</code></td> </tr> <tr> <td><code>mtx-epub.lua</code></td> <td>OPF 2.0.1</td> <td>[https://gist.github.com/1013262 bookid & ncx fix]</td>