Remove no-op implementations from Document and HTMLDocument.
Fix reftests.

`dirname()` now returns a `&'a [u8]` instead of a `Path`, which was serialized
to `[ 1 2 3 4 5 ]`.
Cleanup ClientRect binding.
Cleanup ClientRectList binding.
Cleanup HTMLCollection binding.
Cleanup NodeList bindings.
Remove unused init_wrapper functions.
Remove broken test_getClientRects.html

This broke in ab0d620 and in trying to fix it, it's become clear that I don't
understand the intended behavior of getClientRects().  In fact I only see one
rect in Firefox even when all three <div>s have drawn borders, which confuses
me.  Let's remove the test for now and someone who understands what's going on
(which could be future me!) will re-add it.
Make hubbub depend on libparserutils.
auto merge of #1122 : metajack/servo/fix-hubbub-deps, r=metajack,me

This fixes a parallel build issue where hubbub is built before libparserutils.
auto merge of #1114 : metajack/servo/reftest-sha-fix, r=larsbergstrom

`dirname()` now returns a `&'a [u8]` instead of a `Path`, which was serialized
to `[ 1 2 3 4 5 ]`.
auto merge of #1102 : Ms2ger/servo/dead-document-code, r=jdm

I don't think it's useful to keep those lying around, in particular because we should never even implement some of those (`mozHidden`, `mozVisibilityState`, …)
auto merge of #1116 : Ms2ger/servo/ClientRect, r=kmcallister
auto merge of #1117 : Ms2ger/servo/HTMLCollection, r=kmcallister
auto merge of #1118 : Ms2ger/servo/NodeList, r=kmcallister
auto merge of #1119 : Ms2ger/servo/dead-init_wrapper, r=kmcallister
auto merge of #1121 : kmcallister/servo/client-rect, r=metajack

This broke in ab0d620 and in trying to fix it, it's become clear that I don't understand the intended behavior of `getClientRects()`.  In fact I only see one rect in Firefox even when all three `<div>`s have drawn borders, which confuses me compared to [the spec](http://www.w3.org/TR/cssom-view/#the-getclientrects-and-getboundingclientrect-methods).  Let's remove the test for now and someone who understands what's going on (which could be future me!) will re-add it.
Remove unused get_scope_and_cx functions.
auto merge of #1125 : Ms2ger/servo/ClientRectList, r=jdm
auto merge of #1126 : Ms2ger/servo/get_scope_and_cx, r=jdm