title: parallel coord plot ggplot2 deprecated?
body: <p>When i try to make a parallel coordinate in ggplot2, i get the message that it is deprecated:</p>
  
  <pre><code>require(ggplot2)
  ggpcp(mtcars) + geom_line()
  </code></pre>
  
  <p>Warning message:
  'ggpcp' is deprecated.
  See help("Deprecated")</p>
  
  <p>however, the ggplot documentation did not say anything about this: <a href="http://docs.ggplot2.org/current/ggpcp.html">http://docs.ggplot2.org/current/ggpcp.html</a>. </p>
  
  <p>is there a new pcp function somewhere?</p>