title: emacs org-mode tree to list
body: <p>I'm looking for a concise way to read a specific tree (including subtrees) into a list.</p>
  
  <p>Say I've got:</p>
  
  <pre><code>* Branch
  ** Small branch
  ** Another small branch
  *** Leaves
  * Flowers
  </code></pre>
  
  <p>The function should be able to search by regular expression and copy the subtree (e.g. search for Branch) to a list like:</p>
  
  <pre><code>'(("Small branch") ("Another small branch" ("Leaves")))
  </code></pre>