pygments/pygments.rb: 💎 Ruby wrapper for Pygments syntax highlighter

pygments.rb is a Ruby wrapper for Pygments syntax highlighter. pygments.rb works by talking over a simple pipe to a long-lived Python child process. This library replaces github/albino, as well as an older version of pygments.rb that used an embedded Python interpreter. Each Ruby process that runs has its own 'personal Python'; for example, 4 Unicorn workers will have one Python process each. If a Python process dies, a new one will be spawned on the next pygments.rb request.