title: IntelliJ IDEA : support both SBT and Maven on a single project
body: <p>I already have a project in IntelliJ IDEA based on SBT. It works fine, compile and run. Now I want to add the Maven support as well.
  How is it possible in IntelliJ IDEA having support for both build managers SBT and Maven in the same project and switch between them ?</p>