In order to avoid loading user context as "guest" and then wait to be in ws_images_uploadAsync function to authenticate and load a new user context. This way we deal with "automatic" authentication in the same place (as apache auth or url auth) and we use the more common user context loading mecanism. Making Community compatible is now much easier.
To avoid duplicating too many lines of ws.php into inc/user.inc.php, I have moved the init of ws.php into inc/ws_init.inc.php
