title: Sourcing R script over HTTPS
body: <p>Is there some way to source an R script from the web?</p>
  
  <p>e.g. <code>source('http://github.com/project/R/file.r')</code></p>
  
  <p>Reason: I currently have a project that I'd like to make available for use but isn't ready to be packaged yet. So it would be great to give people a single file to source from the web (that will then source all the individual function files).</p>
  
  <p>On closer inspection, the problem appears to be https. How would I source this file? </p>
  
  <pre><code>https://raw.github.com/hadley/stringr/master/R/c.r
  </code></pre>