<div class="paper-card">
  <h2 class="primary-text">{{title}}</h2>
  <div class="secondary-text">{{yield}}</div>
</div>

<div class="paper-card">
  <h2 class="primary-text">{{title}}</h2>
  <div class="primary-text">{{yield}}</div>
</div>

Update paper card component classes.
Update paper card component classes.
