title: Repeated date in R timeBasedSeq
body: <p>Why does this <code>timeBasedSeq</code> result in repeated 31st of October?</p>
  
  <pre><code>&gt; d &lt;- timeBasedSeq("2010-05-24/2010-11-04/d")
  &gt; d[158:164]
   [1] "2010-10-28" "2010-10-29" "2010-10-30" "2010-10-31"
   [5] "2010-10-31" "2010-11-01" "2010-11-02"
  </code></pre>
  
  <p>Using Package xts version 0.9-7 on R 3.1.2</p>