Update to latest HTML5lib, Add Maruku testdir

Sync with the latest html5lib.
Having the Maruku unit tests on-hand may be useful for debugging; so let's include them.

vendor/plugins/HTML5lib/test19.rb

@@ -0,0 +1,40 @@
+# 
+# This temporary test driver tracks progress on getting HTML5lib working
+# on Ruby 1.9.  Prereqs of Hoe, Hpricot, and UniversalDetector will be
+# required to complete this.
+#
+# Once all the tests pass, this file should be deleted
+#
+
+require 'test/test_cli'
+
+# requires UniversalDetector
+# require 'test/test_encoding'
+
+require 'test/test_input_stream'
+
+# incompatible encoding regexp match
+# require 'test/test_lxp'
+
+require 'test/test_parser'
+
+# warning: method redefined; discarding old test
+# warning: instance variable @expanded_name not initialized
+# require 'test/test_sanitizer'
+
+# warning: instance variable @delegate_sd_obj not initialized
+# require 'test/test_serializer'
+
+# undebugged
+# require 'test/test_sniffer'
+
+require 'test/test_stream'
+
+# warning: shadowing outer local variable - tokens
+# require 'test/test_tokenizer'
+
+# requires hpricot
+# require 'test/test_treewalkers'
+
+# warning: instance variable @delegate_sd_obj not initialized
+# require 'test/test_validator'