revert fb5c572 because our therubyracer/libv8 dependency got replaced by
nodejs a while ago
if a submitter stumbled into our conference management namespace,
redirect them properly
improves "your public name is not valid" error message
fixes used timeslot report, respects time slot duration
fixes state of read-only event public checkbox
fixes static schedule export
removes old abilities test
checks if ticket id can be parsed as a number