[release] pantsbuild.pants 0.0.71

[John Sirois]

Pants 0.0.71 has been released!: https://pypi.python.org/pypi/pantsbuild.pants/0.0.71

This release is primarily comprised of bugfixes, although there was also removal of support for the

deprecated `--use-old-naming-style` flag for the `export-classpath` goal.

If you use pants with custom plugins you've developed, you should be interested in the first

appearance of a means of communicating the public APIs you can rely on.  You can read

https://rbcommons.com/s/twitter/r/3417 to get a peek at what's to come.

Special thanks and welcome to new contributor Dan Fabulich!

And thanks to all the contributors to this release:

      5 John Sirois

      4 Nick Howard

      3 Kris Wilson

      2 Sameer Brenn

      2 Peiyu Wang

      2 Garrett Malmquist

      1 Timur Abishev

      1 Stu Hood

      1 Matt Olsen

      1 Matt Landis

      1 Eric Ayers

      1 Emily Caveness

      1 David Turner

      1 Dan Fabulich