Add Parkaby implementation, sadly it has no gem specification

lib/workbench.rb

@@ -13,6 +13,7 @@ require 'liquid'
 require 'mustache'
 require 'tenjin'
 require 'handlebars'
+# require 'parkaby'
 require 'tilt/erb'
 require 'tilt/erubis'
 require 'tilt/haml'
@@ -24,3 +25,4 @@ require 'workbench/wrappers/mustache'
 require 'workbench/wrappers/slim'
 require 'workbench/wrappers/tenjin'
 require 'workbench/wrappers/handlebars'
+require 'workbench/wrappers/parkaby'

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
+