title: '@layout' isn't locating resources in the XML implementation of the ExpandableLayout from ExpandableLayout library
body: <p>When I try and build the grade I get these errors, both of the same kind, in the XML:</p>
  
  <p>Error:(16) No resource identifier found for attribute 'headerLayout' in package 'com.example.heavymagikhq.expandablelayoutlibrary'</p>
  
  <p>Error:(16) No resource identifier found for attribute 'contentLayout' in package 'com.example.heavymagikhq.expandablelayoutlibrary'</p>
  
  <p>Both indicate the '@layout' function isn't working in this XML code:</p>
  
  <pre><code> &lt;com.andexert.expandablelayout.library.ExpandableLayout
          android:id="@+id/first"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          expandable:headerLayout="@layout/view_header"   -------&gt; Not working 
          expandable:contentLayout="@layout/view_content" -------&gt;Not working
          android:background="#e74c3c"/&gt;
  </code></pre>
  
  <p>Does anyone know how to fix this?</p>
  
  <p>Thanks.</p>