cross platform logic to find Python 2 installation
cross platform logic to find Python 2 installation

tmm1/pygments.rb,shaobin/pygments.rb,hacksterio/pygments.rb,shaobin/pygments.rb,hacksterio/pygments.rb,hayd/pygments.rb,alisdair/pygments.rb,tmm1/pygments.rb,alisdair/pygments.rb,hacksterio/pygments.rb,shaobin/pygments.rb,shaobin/pygments.rb,hayd/pygments.rb,tmm1/pygments.rb,alisdair/pygments.rb,hayd/pygments.rb