Fix Unicode bug

Fix Diego Restrepo's bug (see Rev 184).
Update to latest HTML5lib.

vendor/plugins/HTML5lib/test/test_sniffer.rb

@@ -0,0 +1,27 @@
+require File.join(File.dirname(__FILE__), 'preamble')
+require "html5/sniffer"
+
+class TestFeedTypeSniffer < Test::Unit::TestCase
+  include HTML5
+  include TestSupport
+  include Sniffer
+  
+  html5_test_files('sniffer').each do |test_file|
+    test_name = File.basename(test_file).sub('.test', '')
+
+    tests = JSON.parse(File.read(test_file))
+
+    tests.each_with_index do |data, index|
+      define_method('test_%s_%d' % [test_name, index + 1]) do
+        assert_equal data['type'], html_or_feed(data['input'])
+      end
+    end
+  end
+  # each_with_index do |t, i|
+  #     define_method "test_#{i}" do
+  #       assert_equal t[0], sniff_feed_type(t[1])
+  #     end
+  #   end
+  
+
+end