title: What is best path when need change _ID in many documents of CouchDB?
body: <p><em>CouchDB 1.1, Windows.</em><br>
  I reorganize my database from this structure (example)</p>
  
  <pre><code>{
      "_id": "0 rock-inorganic 2 m m 10 -50 30 a",
      "inner-coord": [50, 90, 20],
      "map": ...
      ...
  }</code></pre>
  
  <p>to this<pre><code>{
      "_id": "0 2 rock-inorganic 10 -50 30 a",
      "inner-coord": [50, 90, 20],
      "map": ...
      ...
  }</code></pre></p>
  
  <p>Please, suggest simple path to rename '_id' for documents (single / many): Futon don't permit it.</p>