google/traceur-compiler — pull request #905 by arv (2014-03-23 18:46:57+00:00)
Title: Async functions

This implements ES7 async functions

https://github.com/lukehoban/ecmascript-asyncawait

```js
async function concat(a, b) {
return await load(a) + await load(b);
}
```

This is covered by the option, `asyncFunctions`. The old option, `deferredFunctions` is deprecated and will log a warning.