title: How to make md-list-item active when selected during ng-repeat?
body: <p>Here is my scenario</p>
  
  <p>When i select any one item in list(<code>&lt;md-list-item&gt;</code>) an active class should be appended for the particular item.  </p>
  
  <p>When iam trying to do it, active class getting appended for all the items. Please help me if anyone knows the solution. Iam new to material design.</p>
  
  <pre><code>&lt;md-list-item class="md-3-line" ng-repeat="review in oReviews" ng-click="fnReviewEmployeeId(review.empId)"&gt;
                  &lt;img ng-src="https://x1.xingassets.com/assets/frontend_minified/img/users/nobody_m.original.jpg" class="md-avatar"&gt;
                  &lt;div class="md-list-item-text" layout="column"&gt;
                      &lt;h3&gt;
                          {{review.name }}
                      &lt;/h3&gt;
                      &lt;span class="review-subtext"&gt;{{review.info}}&lt;/span &gt;
                      &lt;p class="review-status"&gt;{{review.status}}&lt;/p&gt;
                  &lt;/div&gt;
                  &lt;md-divider&gt;&lt;/md-divider&gt;
  &lt;/md-list-item&gt;
  </code></pre>