Rust upgrades
Rust upgrade progress
Rust upgrade for script crate
Rust upgrade for main crate
More rust upgrade changes
Rust upgrade for main crate
glfw-rs link hackery
Fix missing part of Rust upgrade.
Linux portion of Rust upgrade.
Update submodules for Rust upgrade.
Rust upgrade for content and reftests
Submodule updates
Remove all traces of Box representation from bindings. Work around file read runtime problem.
Warning police.
Update submodules for warning police.
Make tests pass once more.
Check properly for None in the headless compositor case