Fix undefined local variable or method error
Fix undefined local variable or method error

Fixes the following error path/to/ruby/2.2.0/gems/jekyll-tidy-0.2.1/lib/jekyll/tidy.rb:36:in `ignore_env?': undefined local variable or method `config' for Jekyll::Tidy:Module (NameError)
apsislabs/jekyll-tidy,apsislabs/jekyll-tidy