added additional rights for AdminUsers/ViewerUsers in /pages/page_settings/pages/settings2.php renamed into /pages/settings_save.php
some validation fixes in backend
fixed a little problem with chmod()
a litte fix in /admin/addons/index.php.added unregister_Theme to CopyTheme::_doRollback()added CopyTheme::_activateTheme()
added backend functions to copy themes and import htt-template files according to the the new theme fallback functionality
+ move admin/themes/templates/ to admin/skel/themes/htt/! and update class.wb.php, upgrade-script.php