master: added function output_debug_box
master: added class debug_box
master: added the basic functionality to use the function output_debug_box
master: updated error function with css class
master: added error_box
master: corrected get_read_permission and get_write_permission
master: fixed permission check for admin menue
master: correct check for selected checkboxes
master: fixed tidystring problem for view
master: updated function validatedate
master: updated function output_debug_box
master: fixed tidystring problem for user
master: fixed tidystring problem for session
master: updated session save