- overhaul of online-exam: - support for new question types * text_interaction * text_entry_interaction * mc interacotpm - support for autocorrection feedback in print-out (first version) based on "correct_when" (this is per tield-type, also extensible) currently 9 types of predicates, "btwn" (heißt "zwischen"), eq, ne, gt, ge, lt, le, match, in - fully internationlaized - todo: * better support for mc, * submission certificates for students (comtaining a digest) * percentage grading * export for potential post-processing of results * improved styling