Refactor compositor to use messages rather than callbacks.
Added mozharness config files
Fix regression on clicking links
auto merge of #597 : eric93/servo/diplaylist-refactor, r=jdm
Bump protoArray size for WindowProxy

Fixes #596
auto merge of #599 : kmcallister/servo/proto-array, r=jdm

Fixes #596

@jdm r?
Rewrite reftest harness and add basic example reftest.
auto merge of #594 : jsyeo/servo/add-MH-configs, r=metajack

For https://bugzilla.mozilla.org/show_bug.cgi?id=891870.
auto merge of #593 : eschweic/servo/windowing-messages, r=metajack

Replaces https://github.com/mozilla/servo/pull/520 so we don't have to go through the pain of rebasing it.
r? @pcwalton
auto merge of #600 : metajack/servo/new-reftest, r=pcwalton

This does not port the existing src/test/html/ref tests to the new framework, as it appears to me that they aren't really reftests in the sense of Gecko's reftest. This new driver uses the Gecko methodology.

Currently this will pop a window for each test due to not having a headless driver yet, and #570 means that servo segfaults when it shuts down so we can't check the exit status.

There's plenty to improve in the future, but this should get us started.
Properly account for relative CSS units in borders, margins, padding, and widths.
Renaming and refactoring `spec_or_default`.

`spec_or_default` is now `specified_or_default` and `specified_or_zero` was
added to handle the most common case.
Brace multi-line match patterns per coding style.
Rename `cb_width` to `containing_width`.
Rename variables for clarity.
auto merge of #602 : metajack/servo/relative-bpm, r=pcwalton

...d widths.
Update README.md

git firewall port is blocked in some environments
Update .gitmodules

https already works, but git doesnt work behind some firewalls
auto merge of #603 : rfielding/servo/master, r=metajack

git port is blocked behind firewalls, use one clone protocol everywhere.
msttcorefonts is a requirement

build and make check will pass, but assertion will fail if msttcorefonts is not installed.