Fixed IE links bug by adding a base64 transparent gif for anchor tags for

IE only.

web/viewer.css

@@ -1392,6 +1392,11 @@ canvas {
   height: 100%;
 }
 
+.annotLink > a /* -ms-a */ {
+  background: url("data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAA\
+                   LAAAAAABAAEAAAIBR‌​AA7") 0 0 repeat;
+}
+
 #errorWrapper {
   background: none repeat scroll 0 0 #FF5555;
   color: white;