Rewrite DocumentType::new to current standards.
Rewrite Text::new to current standards.
Rewrite Comment::new to current standards.
Rewrite DocumentFragment::new to current standards.
Remove Node::as_abstract_node.
Remove node::create.
Add a missing test file causing unhandled conditions during test_collections.html
auto merge of #1190 : Ms2ger/servo/test.jpg, r=jdm
auto merge of #1189 : Ms2ger/servo/new-node, r=jdm
Import unmodified callbacks-related codegen source from Gecko.
Generate code for handling callbacks. Implement add/removeEventListener and hacky dispatchEvent proof-of-concept.
Add Event and EventTarget hierarchy via gross AbstractFoo mechanism.
Add basic event dispatch with bubbling, capturing, and propagation interruption.