Limit the version of Pygments on Python versions prior to 2.6.
Review Request #6692 — Created Dec. 15, 2014 and submitted
Pygments 2.0 dropped support for Python 2.4 and 2.5. If we're running on such a version, we need to ensure we're not going to pull down Pygmnets 2.0. This updates the setup.py to handle this version requirement.
Built a package.