Added Attribute#parent

lib/oga/xml/attribute.rb

@@ -17,6 +17,8 @@ module Oga
       # @return [Oga::XML::Element]
       attr_accessor :element
 
+      alias_method :parent, :element
+
       ##
       # The default namespace available to all attributes. This namespace can
       # not be modified.

spec/oga/xml/attribute_spec.rb

@@ -11,6 +11,15 @@ describe Oga::XML::Attribute do
     end
   end
 
+  describe '#parent' do
+    it 'returns the parent Element' do
+      element = Oga::XML::Element.new(:name => 'foo')
+      attr    = described_class.new(:element => element)
+
+      attr.parent.should == element
+    end
+  end
+
   describe '#namespace' do
     before do
       @namespace = Oga::XML::Namespace.new(:name => 'b')