gnu: Add futile.options.

* gnu/packages/statistics.scm (r-futile-options): New variable.

gnu/packages/statistics.scm

@@ -1597,3 +1597,25 @@ definitions, pattern matching, guard statements, built-in (optional) type
 safety.")
     (license license:lgpl3+)))
 
+(define-public r-futile-options
+  (package
+    (name "r-futile-options")
+    (version "1.0.0")
+    (source (origin
+              (method url-fetch)
+              (uri (cran-uri "futile.options" version))
+              (sha256
+               (base32
+                "1hp82h6xqq5cck67h7lpf22n3j7mg3v1mla5y5ivnzrrb7iyr17f"))))
+    (properties
+     `((upstream-name . "futile.options")))
+    (build-system r-build-system)
+    (home-page "http://cran.r-project.org/web/packages/futile.options")
+    (synopsis "Options management framework")
+    (description
+     "The futile.options subsystem provides an easy user-defined options
+management system that is properly scoped.  This means that options created
+via @code{futile.options} are fully self-contained and will not collide with
+options defined in other packages.")
+    (license license:lgpl3+)))
+