include top tagger info in post tooltip, add box shadow css

app/assets/stylesheets/specific/post_tooltips.scss

@@ -1,6 +1,7 @@
 .post-tooltip {
   max-width: 660px;
   border-color: #767676;
+  box-shadow: 1px 1px 2px #666;
 
   .qtip-content {
     padding: 4px 6px;

app/views/posts/show.html+tooltip.erb

@@ -2,6 +2,7 @@
 
 <div class="post-tooltip-metatags">
   <%= link_to_search "user:#{@post.uploader_name}" if CurrentUser.is_moderator? %>
+  <%= link_to "toptagger:#{@post.keeper.name}", user_path(@post.keeper) %>
   <%= link_to_search "rating:#{@post.pretty_rating.downcase}" %>
   <%= link_to_search "score:#{@post.score}" %>
 </div>