title: R packages "rcom" & "RDCOMClient" not available in R 3.4.1
body: <p>I am using the latest (patched) version of R (3.4.1.) and have been using R2PPT package for some time. Unfortunately, the package doesn't work anymore as rcom &amp; RDCOMClient dependencies don't seem to be available.</p>
  
  <p>The error message is:</p>
  
  <pre class="lang-none prettyprint-override"><code>Warning in install.packages :
    packages ‘rcom’, ‘RDCOMClient’ are not available (for R version 3.4.1 Patched)
  </code></pre>
  
  <p>The same issue was present in the original (unpatched) version of R (3.4.1.)</p>
  
  <p>I'd be grateful for any tips / suggestions</p>
  
  <p>Many thanks,</p>
  
  <p>Joe</p>