Initial s390-tools-2.0.0 import

This commit is based on the s390-tools-1.39.0 version.

Changes on top of s390-tools-1.39.0:

 - Add MIT license to all source files
 - Add LICENSE file
 - Transform REAMDE to README.md (markdown)
 - Add AUTHORS.md file
 - Add CONTRIBUTING.md file
 - Move changelog from README to CHANGELOG.md file

Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>

systemd/cpuplugd.service.in

@@ -0,0 +1,22 @@
+#
+# Systemd unit for the CPU and memory hotplug daemon for Linux on z Systems
+#
+# Copyright IBM Corp. 2016, 2017
+#
+# s390-tools is free software; you can redistribute it and/or modify
+# it under the terms of the MIT license. See LICENSE for details.
+#
+
+[Unit]
+Description=CPU hotplug daemon for Linux on System z
+Documentation=man:cpuplugd(8) man:cpuplugd.conf(5)
+After=remote-fs.target
+
+[Service]
+ExecStart=@usrsbin_path@/cpuplugd -f -c /etc/cpuplugd.conf
+ExecReload=/bin/kill -HUP $MAINPID
+KillMode=process
+Type=simple
+
+[Install]
+WantedBy=multi-user.target