Add Parkaby implementation, sadly it has no gem specification

lib/workbench/wrappers/parkaby.rb

@@ -0,0 +1,14 @@
+module Workbench
+  module Wrappers
+    class Parkaby < Base
+      def initialize path
+        @engine = ::Parkaby::Template.string(File.read(path))
+      end
+
+      def render context, args = {}
+        @engine.render(OpenStruct.new(args))
+      end
+    end
+  end
+end
+