Dates should be able to go xmlschema too [DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3950 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/active_support/core_ext/date/conversions.rb

@@ -25,6 +25,10 @@ module ActiveSupport #:nodoc:
         def to_time(form = :local)
           ::Time.send(form, year, month, day)
         end
+        
+        def xmlschema
+          to_time.xmlschema
+        end
       end
     end
   end