Adds catch, cppunit, spdlog, tinyxml(1 and 2), google benchmark (#2627)

* Adds catch, cppunit, spdlog, tinyxml(1 and 2), google benchmark

Tinyxml comes in two flavors, 1 and 2. Each comes in several
versions... So they cannot be easily united into a single package.

* Use CMakePackage and friends, add copyright

Also eleminate debug/release variants, since it no longuer fits in the
CMakePackage format.

* Remove unnecessary url

* spdlog now has tagged releases

* Remove unnecessary url argument

* Fewer quotes in cmake args, because magic

* Incorrect base class for tinyxml

var/spack/repos/builtin/packages/tinyxml/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 2.6)
+
+project(TinyXml)
+OPTION(TIXML_USE_STL "Use STL with TIXML" ON)
+if(TIXML_USE_STL)
+	add_definitions(-DTIXML_USE_STL)
+endif(TIXML_USE_STL)
+add_library(
+	tinyxml
+	tinyxml.cpp
+	tinystr.cpp
+	tinyxmlerror.cpp
+	tinyxmlparser.cpp
+)
+
+INSTALL( FILES tinyxml.h tinystr.h DESTINATION include )
+INSTALL( TARGETS tinyxml ARCHIVE DESTINATION lib )

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

@@ -0,0 +1,39 @@
+##############################################################################
+# 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 *
+import os.path
+
+
+class Tinyxml(CMakePackage):
+    """Simple, small, efficient, C++ XML parser"""
+
+    homepage = "http://grinninglizard.com/tinyxml/"
+    url = "https://sourceforge.net/projects/tinyxml/files/tinyxml/2.6.2/tinyxml_2_6_2.tar.gz"
+
+    version('2.6.2', 'cba3f50dd657cb1434674a03b21394df9913d764')
+
+    def patch(self):
+        copyfile(join_path(os.path.dirname(__file__),
+                           "CMakeLists.txt"), "CMakeLists.txt")