title: uib-datepicker : minDate doesn't seem to work
body: <p>I don't know how to make the minDate property of my uib-datepicker work.</p>
  
  <p>Here is what I have done:</p>
  
  <pre><code>&lt;div class="form-group"&gt;
      &lt;div class="col-md-6"&gt;
          &lt;label class="col-md-4 control-label" for="field_dateDebut"&gt;Date Début&lt;/label&gt;
          &lt;div class="col-md-5"&gt;
              &lt;div class="input-group"&gt;
                  &lt;input id="field_dateDebut" type="text" class="form-control" name="dateDebut" uib-datepicker-popup="{{dateformat}}" ng-model="vm.mission.dateDebut" is-open="vm.datePickerOpenStatus.dateDebut"
                  /&gt;
                  &lt;span class="input-group-btn"&gt;
                      &lt;button type="button" class="btn btn-default" ng-click="vm.openCalendar('dateDebut')"&gt;&lt;i class="glyphicon glyphicon-calendar"&gt;&lt;/i&gt;&lt;/button&gt;
                  &lt;/span&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
      &lt;div class="col-md-6"&gt;
          &lt;label class="col-md-4 control-label" for="field_dateFinPrevisionnelle"&gt;Date Fin Prévisionnelle&lt;/label&gt;
          &lt;div class="col-md-5"&gt;
              &lt;div class="input-group"&gt;
                  &lt;input id="field_dateFinPrevisionnelle" type="text" class="form-control" name="dateFinPrevisionnelle" uib-datepicker-popup="{{dateformat}}" ng-model="vm.mission.dateFinPrevisionnelle" is-open="vm.datePickerOpenStatus.dateFinPrevisionnelle" minDate = "vm.mission.dateDebut"
                  /&gt;
                  &lt;span class="input-group-btn"&gt;
                      &lt;button type="button" class="btn btn-default" ng-click="vm.openCalendar('dateFinPrevisionnelle')"&gt;&lt;i class="glyphicon glyphicon-calendar"&gt;&lt;/i&gt;&lt;/button&gt;
                  &lt;/span&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>When I click on the first date, I want to disable all the dates previous to this date in the second datepicker.<br>
  If anyone has any idea...</p>
  
  <p>Thank you.</p>