Add basic_fetch and a skeleton http_fetch
Add a basic CORS Cache and a CORS Cache trait
Add a task-based CORS Cache
Add tests for the bit_struct! macro.

The macro crate, when built with `--test`,
now depends on itself (a version of itself built without `--test`).
This is a bit unusal, but allows testing a syntax extension.
I did not feel like making a new crate just for this,
and these tests do not belong in any of the other existing crates.
Only write the px value in Show for Au

The integer Au value is mostly internal and does not make much sense.

Printing both values is very verbose and hurts readability of debug logs.
Dump display lists when debug!() is enabled for gfx::display_list
Convert back to physical some layout coordinates.
Set the origin of the root element per its writing mode.

It’s not always (0, 0) anymore.
Reftests can opt into --experimental
Add a reftest for basic block layout in a vertical writing mode.
Update to png::Image::pixels as an enum.

https://github.com/servo/rust-png/pull/42

This does *not* fix the issue in #3154, but makes it fail!()
instead of (maybe?) reading uninitalized memory.
Merge pull request #3110 from SimonSapin/writing-modes-reftest

Add a basic CSS Writing Modes reftest
Run the same tests for make check on all platforms

This target is no longer run in automation; it's for developer convenience, so
it should really run everything.  Also ensure that `check-all` is a superset
of `check`.
Remove a .orig file left over from conflict resolution.
power
Merge pull request #3153 from SimonSapin/bit-struct-tests

Add tests for the bit_struct! macro. r=mbrubeck
Add support for backgrounds on inline elements. Fix fixup() by removing it.

The code that managed ranges was buggy - failing on edge cases
such as a span within a span. I have refactored the code so that the
context information for inline formatting can optionally be stored
within a fragment. This seems cleaner to me, and fixes the bugs
encountered when making these changes by removing the need for
the fixup() functionality (and ranges).
return null from GetNamespaceURI, not the empty string

correctly mark tests
Factor out code to call JS_DeletePropertyById2.

I'll need to write the same code again for cross-origin wrappers.
Enable some of the HTML tests.