include_code is now more forgiving, stripping leading forward slashes from the code_dir config

plugins/include_code.rb

@@ -38,7 +38,7 @@ module Jekyll
     end
 
     def render(context)
-      code_dir = (context.registers[:site].config['code_dir'] || 'downloads/code')
+      code_dir = (context.registers[:site].config['code_dir'].sub(/^\//,'') || 'downloads/code')
       code_path = (Pathname.new(context.registers[:site].source) + code_dir).expand_path
       file = code_path + @file