add lib/nokogiri/css.rb
add lib/nokogiri/css/node.rb
add lib/nokogiri/css/parser_extras.rb
lib/nokogiri/css/syntax_error.rb
add lib/nokogiri/css/xpath_visitor.rb
add lib/nokogiri/decorators/slop.rb
add lib/nokogiri/html.rb
add lib/nokogiri/html/document.rb
 add lib/nokogiri/html/document.rb
Add lib/nokogiri/html/*.rb for ext c