EZP-20455: eZUser::isLoggedIn does not correctly check user's state

Deprecate isLoggedIn() in favor of the new isRegistered() and the
existing isUserLoggedIn() methods.
Fixed EZP-20512: Fatal error when uploading file to object relations with certain permissions
Merge pull request #570 from patrickallaert/EZP-20512

Fixed EZP-20512: Fatal error when uploading file to object relations with certain permissions
Merge pull request #566 from patrickallaert/EZP-20455

EZP-20455: eZUser::isLoggedIn does not correctly check user's state
Revert "If $dataString is empty $dataString == $storageDir"

This reverts commit e597681df421e0778986925d1c42278a987b895d.
Added module result to output as attribute for better integration with Symfony stack

Refs EXP-20576
CS edits for EZP-20576
Merge pull request #576 from blendinteractive/EZP-20576

Added module result to output as attribute for better integration with Symfony
Fixed potential fatal error in tree menu when eZUpdateDebugSettings function is already defined
Update YUI3 to 3.9.0
Update TinyMCE to 3.5.8