pass time object to liquid when time is specified in front matter

lib/jekyll/post.rb

@@ -201,7 +201,8 @@ module Jekyll
     #
     # Returns <Hash>
     def to_liquid
-      { "title"      => self.data["title"] || self.slug.split('-').select {|w| w.capitalize! || w }.join(' '),
+      self.data.deep_merge({ 
+        "title"      => self.data["title"] || self.slug.split('-').select {|w| w.capitalize! || w }.join(' '),
         "url"        => self.url,
         "date"       => self.date,
         "id"         => self.id,
@@ -209,7 +210,7 @@ module Jekyll
         "next"       => self.next,
         "previous"   => self.previous,
         "tags"       => self.tags,
-        "content"    => self.content }.deep_merge(self.data)
+        "content"    => self.content })
     end
 
     def inspect