py-rtree: Added package (#1548)

* py-rtree: Added package

* py-rtree = RTree (spatial indexing) data structure for Python
* libspatialindex = Underlying C library wrapped by py-rtree

* Flake8 and Copyright issues.

* Fix Python syntax error.

* Fixed dependency type error.

* Added new version, based on updates requested in upstream PR

* 1. Change cmake to build dependency.
2. Updated to CMakePackage

var/spack/repos/builtin/packages/libspatialindex/package.py

@@ -0,0 +1,34 @@
+##############################################################################
+# Copyright (c) 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 Libspatialindex(CMakePackage):
+    homepage = "http://http://libspatialindex.github.io"
+    url      = "https://github.com/libspatialindex/libspatialindex/tarball/1.8.5"
+
+    version('1.8.5', 'a95d8159714dbda9a274792cd273d298')
+
+    depends_on("cmake", type='build')