New package - RStan

This PR creates the RStan package and its dependencies.

var/spack/repos/builtin/packages/r-stringi/package.py

@@ -0,0 +1,51 @@
+##############################################################################
+# 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 *
+
+
+class RStringi(Package):
+    """Allows for fast, correct, consistent, portable, as well as convenient
+    character string/text processing in every locale and any native encoding.
+    Owing to the use of the ICU library, the package provides R users with
+    platform-independent functions known to Java, Perl, Python, PHP, and Ruby
+    programmers. Among available features there are: pattern searching (e.g.,
+    with ICU Java-like regular expressions or the Unicode Collation Algorithm),
+    random string generation, case mapping, string transliteration,
+    concatenation, Unicode normalization, date-time formatting and parsing,
+    etc."""
+
+    homepage = "http://www.gagolewski.com/software/stringi/"
+    url      = "https://cran.r-project.org/src/contrib/stringi_1.1.1.tar.gz"
+    list_url = "https://cran.r-project.org/src/contrib/Archive/stringi"
+
+    version('1.1.1', '32b919ee3fa8474530c4942962a6d8d9')
+
+    extends('R')
+
+    depends_on('icu')
+
+    def install(self, spec, prefix):
+        R('CMD', 'INSTALL', '--library={0}'.format(self.module.r_lib_dir),
+          self.stage.source_path)