title: In SBT, Is it possible to add IntegrationTest config to a project using an AutoPlugin?
body: <p>I'm developing an AutoPlugin and I want it to add the <code>IntegrationTest</code> config to projects that enable the plugin. Is this possible?</p>
  
  <p>My first thought was this could be possible in the <code>buildSettings</code>, however examples I've seen for adding <code>IntegrationTest</code> config show achieved via a method call on a <code>Project</code> instance... i.e. (<a href="http://www.scala-sbt.org/0.12.4/docs/Detailed-Topics/Testing.html#integration-tests" rel="nofollow">from the SBT docs</a>):</p>
  
  <pre><code>lazy val root =
    Project("root", file("."))
      .configs( IntegrationTest )
      .settings( Defaults.itSettings : _*)
  </code></pre>