Make LayoutReader#layout_directory public.

Since it's being used in a test, let's go ahead and expose it instead of
dealing with using Object#send to send the message along.

lib/jekyll/layout_reader.rb

@@ -14,6 +14,10 @@ module Jekyll
       @layouts
     end
 
+    def layout_directory
+      @layout_directory ||= (layout_directory_in_cwd || layout_directory_inside_source)
+    end
+
     private
 
     def layout_entries
@@ -33,10 +37,6 @@ module Jekyll
       Dir.chdir(directory) { yield }
     end
 
-    def layout_directory
-      @layout_directory = (layout_directory_in_cwd || layout_directory_inside_source)
-    end
-
     def layout_directory_inside_source
       # TODO: Fix for Windows
       File.join(site.source, File.expand_path(site.config['layouts'], "/"))

test/test_layout_reader.rb

@@ -16,7 +16,7 @@ class TestLayoutReader < Test::Unit::TestCase
 
     context "when no _layouts directory exists in CWD" do
       should "know to use the layout directory relative to the site source" do
-        assert_equal LayoutReader.new(@site).send(:layout_directory), source_dir("_layouts")
+        assert_equal LayoutReader.new(@site).layout_directory, source_dir("_layouts")
       end
     end
 
@@ -27,7 +27,7 @@ class TestLayoutReader < Test::Unit::TestCase
       end
 
       should "know to use the layout directory relative to CWD" do
-        assert_equal LayoutReader.new(@site).send(:layout_directory), source_dir("blah/_layouts")
+        assert_equal LayoutReader.new(@site).layout_directory, source_dir("blah/_layouts")
       end
     end
   end