fix test_filters classname and add to manifest

Manifest.txt

@@ -31,6 +31,7 @@ test/source/_posts/2008-12-13-include.markdown
 test/source/css/screen.css
 test/source/index.html
 test/suite.rb
+test/test_filters.rb
 test/test_generated_site.rb
 test/test_jekyll.rb
 test/test_post.rb

test/test_filters.rb

@@ -1,6 +1,6 @@
 require File.dirname(__FILE__) + '/helper'
 
-class TestSite < Test::Unit::TestCase
+class TestFilters < Test::Unit::TestCase
   
   class JekyllFilter
     include Jekyll::Filters