Better management of async

[federico-lox]

window.postMessage is proved to be invoked earlier than setTimeout:

https://developer.mozilla.org/en/DOM/window.postMessage
http://dbaron.org/log/20100309-faster-timeouts

The problem is that is not supported everywhere:

http://caniuse.com/#feat=x-doc-messaging

Idea (to be tested):

use postMessage, if not available fallback to setTimeout (NodeJS/Browser) or Titanium.Application.fireEvent (Titanium)

[federico-lox]

It's 2014 and window.postMessage is supported everywhere! YAY! 👍

For Node the code should use the process.nextTick (see here)

No need to include a case for setImmediate as it uses the same internals of window.postMessage and Gecko + Webkit aren't going to implement it any time soon