Build something that works
Check out RedCloth (https://github.com/jgarber/redcloth) and coderay (https://github.com/rubychan/coderay)
Which one do you use in the show notes?
Those are the two that I use.
Redcloth doesn't seem to work on ruby 2.0.0 +
Do you know of a solution for this?
Are you sure? I'm using Ruby 2.1.1 and it works.