asutherland/q — comment on commit 23dc167b77eac1cb27413de0058ab6af51a5b3cc
File: q.js line 902
By kriskowal:

The CommonJS spec reserves the fourth argument for a progress handler. However, I’ve been toying with the idea of adding .annotation or .progress functions to promise chains. Perhaps this could be sugar for passing an annotation as a fifth argument.

```javascript
promise.note = function (note) {
return when(this, null, null, null, note);
}
```