Merge pull request #180 from mariovisic/cache_double_render_error

Issue #176 Fix: Do not render twice for cached pages.

lib/locomotive/render.rb

@@ -103,7 +103,7 @@ module Locomotive
           end
         end
 
-        render :text => output, :layout => false, :status => page_status
+        render :text => output, :layout => false, :status => page_status unless performed?
       end
 
       def not_found_page