title: Just downloaded the Scala Lift chat application and use the instructions to run it, but it fails
body: <p>I cloned the project from:</p>
  
  <pre><code>https://github.com/dpp/simply_lift.git
  </code></pre>
  
  <p>Then I followed the instructions which state:</p>
  
  <pre><code>Change directories into the chat directory and type sbt update ~jetty-run.
  </code></pre>
  
  <p>SBT fetches dependencies, and then I get this:</p>
  
  <pre><code>[error] Not a valid command: jetty-run
  [error] Expected '/'
  [error] Expected ':'
  [error] Not a valid key: jetty-run (similar: run)
  [error] jetty-run
  [error]
  </code></pre>
  
  <p>Now what?      </p>