Update submodules for EXT_DEPS dependency tracking.
Don't implement `ne` for ImageResponseMsg, since it matches the default.
auto merge of #2504 : zwarich/servo/dont-implement-ne, r=jdm
Fix unused_result warning in script_task
auto merge of #2503 : metajack/servo/ext-deps-redux, r=mbrubeck

@mbrubeck r?
Enable inline event handlers for XHR, and add most progressevent calls
auto merge of #2505 : Manishearth/servo/events-events-events, r=jdm

events events events!

Blocks #2282
auto merge of #2506 : Manishearth/servo/clickevent-warning, r=jdm
Add the 'direction' property and fix one RTL layout corner case.
auto merge of #2508 : SimonSapin/servo/direction, r=pcwalton
JSRef<T> & Root<T> contains '*T' instead of RefCell.
JS<T> contains '*T' instead of RefCell.
fixup! JS<T> contains '*T' instead of RefCell.
Make 'Cell<JS<T>>' traceable.
Make 'RefCell<Vec<JS<T>>>' traceable.
Use Cell/RefCell for interior mutability of Attr, AttrList, Blob,
BrowserContext, ClientRect, and ClientRectList.
Make 'Cell<Option<JS<T>>>' traceable.
Use Cell/RefCell for interior mutability of Document.
Use Cell/RefCell for interior mutability of DOMImplementation and DOMParser.
Use Cell/RefCell for interior mutability of Element.