[TIMOB-2107] iOS: HTTPClient doesn't execute callbacks before returning in synchronous mode

When HTTPClients are opened in synchronous mode (the third parameter set to false), the send call returns before executing the attached callbacks. I know it seems weird wanting to use callbacks with a synchronous call, but this behaviour seems to be expected of other XHR like objects by libraries like jQuery and SpazCore.

Try running this code to reproduce the issue:

  var bool, xhr;
  xhr = Titanium.Network.createHTTPClient();
  bool = false;
  xhr.open("GET", "http://api.twitter.com/1/help/test.json", false);
  xhr.onreadystatechange = function() {
    Ti.API.debug("Ready State change to " + xhr.status);
    if (xhr.status === 200) {
      Ti.API.debug("Setting bool to true");
      bool = true;
    }
  };
  xhr.send();
  Ti.API.debug("Bool is: " + bool);

Output I get from iPhone SDK v4.1, Titanium Mobile SDK v1.4.0

[DEBUG] Bool is: false
[DEBUG] Ready State change to 200
[DEBUG] Setting bool to true

What I think I should see:

[DEBUG] Ready State change to 200
[DEBUG] Setting bool to true
[DEBUG] Bool is: true

If you run this code in chrome in a console on api.twitter.com:

  var bool, xhr;
  xhr = new XMLHttpRequest();
  bool = false;
  xhr.open("GET", "http://api.twitter.com/1/help/test.json", false);
  xhr.onreadystatechange = function() {

console.log("Ready State change to " + xhr.status);
if (xhr.status === 200) {
  console.log("Setting bool to true");
  bool = true;
}

  };
  xhr.send();
  console.log("Bool is: " + bool);

You get the above expected output:

Ready State change to 200
Setting bool to true
Bool is: true

Can Titanium's XHR implementation be changed to conform?