py-markdown: Add new package for python-markdown. (#2611)

* py-markdown: Add new package for python-markdown.

* py-markdown: Added restrictions on Python version.

* py-markdown: Removed upper-limit on compatible Python versions.

* py-markdown: Reinstated upper bound on Python version. Also fixed small formatting error.

var/spack/repos/builtin/packages/py-markdown/package.py

+##############################################################################
+# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/llnl/spack
+# Please also see the LICENSE file for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License (as
+# published by the Free Software Foundation) version 2.1, February 1999.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+
+from spack import *
+
+
+class PyMarkdown(Package):
+    """This is a Python implementation of John Gruber's Markdown. It is
+    almost completely compliant with the reference implementation, though
+    there are a few very minor differences. See John's Syntax
+    Documentation for the syntax rules.
+    """
+
+    homepage = "https://pythonhosted.org/Markdown/"
+    url      = "https://github.com/waylan/Python-Markdown/archive/2.6.7-final.tar.gz"
+
+    version('2.6.7', 'fd27044042e197ad99249b3d60215d97')
+    version('2.6.6', '2b47a0ff7eb19ef34453fe198a0cccc4')
+    version('2.6.5', 'e4b6b65b2d6bcac07176fb209bc55614')
+    version('2.6.4', '5fb3cd9945eb534e71af597f8ee3622b')
+    version('2.6.3', 'ec7a50ce9fd4a5fd0b24555d47e9d7d1')
+    version('2.6.2', '6ce86913e9bf5bb34d9ee394ac71f044')
+    version('2.6.1', '0ae69693c5adb27caf0160941d7dcbdf')
+    version('2.6', '9acdde43d99847d0c4ef03ea56b1d2c5')
+    version('2.5.2', 'ed2a662d22799186c1ef85d173d38b8a')
+    version('2.5.1', 'be6f6ba65a8fb843d2aaf1fcdd68c755')
+    version('2.5', '8393ceab9c6e33357fb8a7be063a4849')
+
+    extends('python')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('python@2.7:2.8,3.2:3.4')
+
+    def url_for_version(self, version):
+        base_url = "https://github.com/waylan/Python-Markdown/archive"
+        return "{0}/{1}-final.tar.gz".format(base_url, version)
+
+    def install(self, spec, prefix):
+        setup_py('install', '--prefix={0}'.format(prefix))