Add definition with test for when.settle, add a test for when.all

when/when-tests.ts

@@ -91,6 +91,16 @@ promise = liftedFunc5(when(1), when('2'), when(true), when(4), when('5'));
 
 var joinedPromise: when.Promise<number[]> = when.join(when(1), when(2), when(3));
 
+/* when.all(arr) */
+when.all<number[]>([when(1), when(2), when(3)]).then(results => {
+	return results.reduce((r, x) => r + x, 0);
+});
+
+/* when.settle(arr) */
+when.settle<number>([when(1), when(2), when.reject(new Error("Foo"))]).then(descriptors => {
+	return descriptors.filter(d => d.state === 'rejected').reduce((r, d) => r + d.value, 0);
+});
+
 /* when.promise(resolver) */
 
 promise = when.promise<number>(resolve => resolve(5));