patch by Diego 'Flameeyes' Petteno < flameeyes at gentoo dot org >

  (fixes a crash with mono streams)

Improve non-handling by interfaces without interaction

Dirty currently ... 

* Handle interfaces not providing interaction correctly
* Add a new helper to request authentication
* Add return codes

directx.c: fixed the initial grey flicker when using overlay surfaces by postponing painting the overlay colorkey until the first picture has been received the vout display