Expose page.path to post templates.

Can be used for for e.g. "Edit in TextMate" links. See http://github.com/henrik/henrik.nyh.se.

lib/jekyll/post.rb

@@ -155,6 +155,13 @@ def date
         end
       end
     end
+
+    # The path to the post file.
+    #
+    # Returns <String>
+    def path
+      File.expand_path(File.join(@base, @name))
+    end
 
     # Calculate related posts.
     #
@@ -238,6 +245,7 @@ def to_liquid
         "url" => self.url,
         "date" => self.date,
         "id" => self.id,
+        "path" => self.path,
         "topics" => self.topics,
         "categories" => self.categories,
         "tags" => self.tags,