portal_base.html

      span.stars {
        float: left;
        height: 0;
        width: 100px;
        overflow: hidden;
        padding: 20px 0 0 0;
        background: url("/static/images/rating_stars.png") no-repeat;
        background-color: green;
        border: 1px solid white;
      }

      span.stars0   { background-position: 0% -445px; }
      span.stars0_5 { background-position: 0% -13px;  }
      span.stars1   { background-position: 0% -56px; }
      span.stars1_5 { background-position: 0% -99px; }
      span.stars2   { background-position: 0% -142px; }
      span.stars2_5 { background-position: 0% -185px; }
      span.stars3   { background-position: 0% -228px; }
      span.stars3_5 { background-position: 0% -271px; }
      span.stars4   { background-position: 0% -314px; }
      span.stars4_5 { background-position: 0% -357px; }
      span.stars5   { background-position: 0% -400px; }