Update README to reflect that linkedin's pygradle produces pex files (#308)
Update README to reflect that linkedin's pygradle produces pex files (#308)

* Update README.rst
snyaggarwal/pex,pantsbuild/pex,jsirois/pex,sixninetynine/pex,kwlzn/pex,kwlzn/pex,jsirois/pex,sixninetynine/pex,pantsbuild/pex,snyaggarwal/pex