dateutils: new package (#11623)

* Adding the dateutils package
* Removing superfluous dependencies

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

@@ -0,0 +1,19 @@
+# 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 Dateutils(AutotoolsPackage):
+    """Dateutils are a bunch of tools that revolve around fiddling with dates
+    and times in the command line with a strong focus on use cases that arise
+    when dealing with large amounts of financial data."""
+
+    homepage = "http://www.fresse.org/dateutils/"
+    url      = "https://github.com/hroptatyr/dateutils/releases/download/v0.4.6/dateutils-0.4.6.tar.xz"
+
+    version('0.4.6', sha256='26a071317ae5710f226a3e6ba9a54d3764cd9efe3965aecc18e75372088757cd')
+    version('0.4.5', sha256='16d6a0fe7b7d49ddbb303f33538dd7304a0d4af5a0369bcbf275db6a5060cbde')
+
+    build_directory = 'spack-build'