EasyBuild and dependencies (#3658)

* add packages for EasyBuild and dependencies

* fix remarks w.r.t. docstrings & download urls, make dependency specs stricter w.r.t. required versions

* fix easybuild-* dep specs, should be open-ended

* correct dep specs for easybuild and easybuild-easyconfigs using @3.1.2[:]

var/spack/repos/builtin/packages/py-vsc-base/package.py

@@ -0,0 +1,35 @@
+##############################################################################
+# Copyright (c) 2017, Kenneth Hoste
+#
+# 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 PyVscBase(PythonPackage):
+    """Common Python libraries tools created by HPC-UGent"""
+
+    homepage = 'https://github.com/hpcugent/vsc-base/'
+    url      = 'https://pypi.io/packages/source/v/vsc-base/vsc-base-2.5.8.tar.gz'
+
+    version('2.5.8', '57f3f49eab7aa15a96be76e6c89a72d8')
+
+    depends_on('py-setuptools', type=('build', 'run'))