Updatre tree images with png

remove old gif

Author: bricesanchez

core/app/assets/images/refinery/branch-end.gif

@@ -13,7 +13,7 @@
       display: block
       margin: 0
       padding: 0.25em 0 0 2em
-      background: image_url('refinery/branch.gif') no-repeat 15px 0px
+      background: image_url('refinery/branch.png') no-repeat 15px 0px
 
       span.item
         display: block
@@ -37,7 +37,7 @@
             @include icon('spinner')
 
       &:first-child
-        background-image: image_url('refinery/branch-start.gif')
+        background-image: image_url('refinery/branch-start.png')
 
       &:last-child
         background-image: image_url('refinery/branch-end.png')