added clone() method (Carlos Fernando Avila Gratz)
now storing comments from parsed html (Carlos Fernando Avila Gratz)
fixed remove() to get rid of removed element refs removes from $self and from all $self->{before}. Also modified how each() instantiates the objects, so $_->end works in the callback, which is needed for $_->remove() to work in the callback. (Carlos Fernando Avila Gratz)