Updated py-setuptools to 36.0.1.

v36.0.1
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* #1042: Fix import in py27compat module that still
  referenced six directly, rather than through the externs
  module (vendored packages hook).

v36.0.0
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* #980 and others: Once again, Setuptools vendors all
  of its dependencies. It seems to be the case that in
  the Python ecosystem, all build tools must run without
  any dependencies (build, runtime, or otherwise). At
  such a point that a mechanism exists that allows
  build tools to have dependencies, Setuptools will adopt
  it.

(wiz)