title: Install scale in R
body: <p>I try to install scale in R by:</p>
  
  <pre><code>devtools::install_github("scale",username="hadley/scale")
  </code></pre>
  
  <p>But </p>
  
  <pre><code>Downloading github repo hadley/scale/scale@master
  Error in download(dest, src, auth) : client error: (404) Not Found
  In addition: Warning message:
  Username parameter is deprecated. Please use hadley/scale/scale
  </code></pre>