added close button to modal

Author: mpliang

index.html

@@ -348,6 +348,7 @@ <h2>Get in touch</h2>
                   </div>
                   <div class="modal-footer">
                     <div class="col-md-12">
+                      <button type="button" class="btn" data-dismiss="modal">Close</button>
                       <button type="submit" class="btn btn-skin pull-right" id="btnContactUs">
                         Send Message</button>
                     </div>