py-python-memcached: added new package at version 1.59 (#13133)

* Added package py-python-memcached, a dependency of python-oauth2

* Fixed line lengths

var/spack/repos/builtin/packages/py-python-memcached/package.py

@@ -0,0 +1,21 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyPythonMemcached(PythonPackage):
+    """This software is a 100% Python interface to the memcached memory cache
+    daemon. It is the client side software which allows storing values in one
+    or more, possibly remote, memcached servers. Search google for memcached
+    for more information."""
+
+    homepage = "https://pypi.org/project/python-memcached/"
+    url      = "https://pypi.io/packages/source/p/python-memcached/python-memcached-1.59.tar.gz"
+
+    version('1.59', sha256='a2e28637be13ee0bf1a8b6843e7490f9456fd3f2a4cb60471733c7b5d5557e4f')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-six@1.4.0:', type=('build', 'run'))