progress on redmine 2.0 porting

lib/redmine_rate/hooks/view_layouts_base_html_head_hook.rb

@@ -2,7 +2,7 @@ module RedmineRate
   module Hooks
     class ViewLayoutsBaseHtmlHeadHook < Redmine::Hook::ViewListener
       def view_layouts_base_html_head(context={})
-        return content_tag(:style, "#admin-menu a.rate-caches { background-image: url('#{image_path('database_refresh.png', :plugin => 'redmine_rate')}'); }", :type => 'text/css')
+        stylesheet_link_tag "rate.css", :plugin => "redmine_rate"
       end
     end
   end