Refactoring Xmlnuke: Removing xmlnuke.php, xmlnukeadmin.php, uniitest.php and writepage.inc.php

Added Classes inside the engine to manage it.
Refactoring Xmlnuke: Removing xmlnuke.php, xmlnukeadmin.php, uniitest.php and writepage.inc.php

Added Classes inside the engine to manage it.
Refactoring Xmlnuke: Removing deprecated site parameter
Added new Exceptions to handle properly the module exception and Snippet Excepion
UploadFilenameProcessor now have a default constructor to save to /tmp directory