More accurate margin collapsing
Remove unused variable and parameter
Implement the rest of 'text-decoration' property.
Use is_float.is_some() instead of !is_float.is_none().
auto merge of #931 : sammykim/servo/issue906, r=jdm

Fix #906
auto merge of #933 : saneyuki/servo/is_some, r=jdm

Fix #919
Move border computation into unpruned traversal. Get rid of extraneous explicit initial reflow. Fixes #935.
auto merge of #938 : jdm/servo/borderincremental, r=metajack

...xplicit initial reflow. Fixes #935.
Allow image prefetching to occur during parsing when no window or document is present. Fixes #939.
Add content harness timeout.
Make CreateElement comply with the spec.
auto merge of #940 : jdm/servo/imagefix, r=metajack
auto merge of #910 : metajack/servo/fix-create-element, r=jdm
Introduce a createText function.
Issue #852 - Implement the Node.textContent setter.
Fix android/font.rs. Add an issue in macos/font.rs
Fix error: declare a module.
auto merge of #932 : june0cho/servo/text_deco, r=metajack

Implement 'overline' and 'line-through' in 'text-decoration' property. Add a test case.
Pass the AbstractNode into the Node.textContent setter.
Make all DOM manipulation wait until it's safe to do so (ie. all reflows for the page have completed). Fix a race where a newly-initiated reflow would be considered complete when receiving the completion notice for the previous reflow.