template range with-param "id"
indent fix
ignore xml processing errors
add fnct  get_public_page_path, get_public_navbar
add fnct _tree
add tests
rename hashkey course to public
test and update update_data_struct for corpus
test get_data_struct
Test for get_data_course
Test for get_data_modul
Test for get_data_library
Test for get_data_corpus
error message by defined $err
miss one commit #0624710
no bless in register create pivate constructor
Test for {create,rm}_public_path
change fnct position
Test for create_public_chapter
Test for {save,load}_public_struct