title: Remove duplicates and finding unique sublists
body: <p>I have a nested list that looks like this:</p>
  
  <pre><code>lst = [[1,2,3],[1,2],[1,2,3],[2,3],[4,5],[2,3],[2,4],[4,2]]
  </code></pre>
  
  <p>I would like to find the unique sublists in <code>lst</code>. Using the above example, I'd like to find:</p>
  
  <pre><code>lst_set = [1,2,3],[1,2],[2,3],[4,5],[2,4]]
  </code></pre>
  
  <p>Order does not matter. In otherwords, <code>[2,4]</code> and <code>[4,2]</code> are the same.</p>