add download link css and image lokesh#312 lokesh#216 lokesh#265

Author: madhums

css/lightbox.css

@@ -208,3 +208,21 @@ body:after {
   filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
   opacity: 1;
 }
+
+.lb-download{
+  border-radius: 5px;
+  display: block;
+  height: 40px;
+  width: 40px;
+  background: url(../img/arrow-down.png) 50% 50% no-repeat;
+  background-color: rgba(0,0,0,.5);
+  transition: .2s;
+  opacity: .3;
+  position: absolute;
+  bottom: 15px;
+  right: 15px;
+  z-index: 11;
+}
+.lb-download:hover{
+  opacity: 1;
+}