Nmap package added (#2206)

* works to build newest version of nmap with gcc@5.3.0

* formatting

* clean up

var/spack/repos/builtin/packages/nmap/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 Nmap(AutotoolsPackage):
+    """Nmap ("Network Mapper") is a free and open source (license) 
+       utility for network discovery and security auditing. 
+       It also provides ncat an updated nc"""
+
+    homepage = "https://nmap.org"
+    url      = "https://nmap.org/dist/nmap-7.31.tar.bz2"
+
+    version('7.31', 'f2f6660142a777862342a58cc54258ea')
+    version('7.30', '8d86797d5c9e56de571f9630c0e6b5f8')