Generate bindings for HTMLSpanElement
Generate bindings for HTMLParagraphElement.
Generate bindings for HTMLScriptElement.
Generate bindings for HTMLHRElement.
auto merge of #682 : saneyuki/servo/span-webidl, r=jdm
auto merge of #683 : saneyuki/servo/webidl, r=jdm
Merge branch 'master' into title

Conflicts:
	src/components/script/dom/bindings/codegen/Bindings.conf
	src/components/script/dom/bindings/codegen/CodegenRust.py
	src/components/script/dom/bindings/node.rs
	src/components/script/dom/bindings/utils.rs
	src/components/script/dom/element.rs
	src/components/script/html/hubbub_html_parser.rs
	src/components/script/script.rc