Show symlink directory icon in tree view

src/packages/tree-view/lib/directory-view.coffee

@@ -22,7 +22,11 @@ class DirectoryView extends View
     @expand() if isExpanded
     @disclosureArrow.on 'click', => @toggleExpansion()
 
-    iconClass = 'directory-icon'
+    if @directory.symlink
+      iconClass = 'symlink-icon'
+    else
+      iconClass = 'directory-icon'
+
     if git?
       path = @directory.getPath()
       if parent

src/packages/tree-view/stylesheets/tree-view.less

@@ -90,6 +90,7 @@
     .directory-icon { .octicon(file-directory); }
     .repository-icon { .octicon(repo); }
     .submodule-icon { .octicon(file-submodule); }
+    .symlink-icon { .octicon(file-symlink-directory); }
   }
 
   .directory.expanded > .header {