implement HTMLDataListElement.options
Remove a dead argument from CGAbstractMethod methods.
Return a JS<T> from *Binding::Wrap rather than a JSObject.

This lets us avoid the sketchy tricks in JS::new and Window::new, where we
kept an unsafe pointer to the native object across the Wrap call that
consumed the owned pointer.
Implement named constants in bindings
Moved compareDocumentPosition content test to proper directory
Update mozjs.
Don't call bind_to_tree when appending a node to another node that isn't in the tree (fixes #1874).
auto merge of #1914 : evilpie/servo/constants, r=Ms2ger

Generated code looks like this:

```rust
pub mod UIEventConstants {
  static SCROLL_PAGE_UP: i32 = -32768;
  static SCROLL_PAGE_DOWN: i32 = 32768;
} // mod UIEventConstants
```
Expose named constants in bindings.
Use 'NodeConstants' instead of magic numbers.
Use 'TConstants' instead of magic numbers.
auto merge of #1929 : saneyuki/servo/const, r=Ms2ger

We can use `TConstants` instead of by #1914 fixed.
Implement HTMLFieldSetElement.elements.(fixes #1843)
Rust upgrades
Remove all traces of Box representation from bindings. Work around file read runtime problem.
Warning police.
Update submodules for warning police.
Rust upgrade for android
Rust upgrades
Make tests pass once more.