Added lib/xml/libxml.rb for backward compatibility.
Added lib/xml/libxml.rb for backward compatibility.


xml4r/libxml-ruby,increments/libxml-ruby,sferik/libxml-ruby,increments/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby,xml4r/libxml-ruby,xml4r/libxml-ruby,increments/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby