start a new ruby layer to do the to_vool conversion

the "normalization" is getting more and more complicated and is not tested
And it seems i really don't like working with the untyped ast

lib/ruby/return_statement.rb

@@ -0,0 +1,23 @@
+module Ruby
+  class ReturnStatement < Statement
+    include Normalizer
+
+    attr_reader :return_value
+
+    def initialize(value)
+      @return_value = value
+    end
+
+    def normalize
+      val , rest = *normalize_name(@return_value)
+      me = ReturnStatement.new(val)
+      return me unless rest
+      rest << me
+      rest
+    end
+
+    def to_s(depth = 0)
+      at_depth(depth , "return #{@return_value.to_s}")
+    end
+  end
+end