title: Import card.io source code as a modul in Android studio project
body: <p>I've downloaded the card.io source code and i wish to implement it as a new Android-Library module in my project.</p>
  
  <p>Tried <code>import -&gt; Module -&gt; chose the source code library</code>.</p>
  
  <blockquote>
    <p>Error:(24, 0) Could not find property 'plugin' on com.android.build.gradle.LibraryExtension_Decorated@4a00927b.</p>
  </blockquote>
  
  <p>I'm kind of lost here about how to fix it and make it work. </p>