Cancel all subpromises as soon as cancelled.

This functionnality has never been used.

Revert "Queue notifications are now enabled"
This reverts commit 58953a31.

Revert "notifications are not propagated to parents fixed"
This reverts commit 41eba17a.

Revert "add notifier to `all` and `any`"
This reverts commit 34a4233b.

Revert "Add Promise progress"
This reverts commit a79070b4.

This reverts commit f47dc87e

It breaks Firefox compatibility for jio/renderjs.

Conflicts:
	lib/rsvp/all.js
	test/tests/extension_test.js

Rejection should be propagated.

Queue allow to control the execution of a list of promises.
Especially, it can cancel the list of promises.

The queue is fulfilled only when all pushed promises are fulfilled.
It gets the latest push promise fulfillmentValue as result.

    var queue;
    queue = RSVP.Queue();
    queue.push(function () {
      return 1;
    };
    queue.push(function (value) {
      return value + 1;
    };
    queue.then(function (value) {
      assert(value === 2);
    };

Cancel all sub promises as soon as cancelled.

Cancel allow to manually interrupt a promise execution.
The promise becomes rejected with a CancellationError.

var xhr, promise;
promise = RSVP.Promise(
  // Resolver function
  function (done, fail) {
    xhr = new XMLHttpRequest();
    xhr.open("GET", url);
    xhr.send();
  },
  // Canceller function
  function () {
    xhr.abort();
  },
)
promise.cancel();