title: Specify jar structure in sbt assembly
body: <p>When sbt-assembly builds a fat jar, it places all the dependencies in the main folder. I need to construct a jar that looks like this</p>
  
  <p>--domain</p>
  
  <ul>
  <li>domain classes</li>
  </ul>
  
  <p>-- lib</p>
  
  <ul>
  <li>dependency classes</li>
  </ul>
  
  <p>is it possible to do this with sbt assembly, or any other plugin?</p>