use raty to show stars for all ratings/feedbacks
handle pentbarf booleans (t/f)
guard against nil days
allow reviewers to read other Person objects
redirect to :back instead of login screen if an ability is missing
show conference acronym for events that do not belong into the current
conference. This applies to the person page and the event information
page.
pentabarf import: use the event state instead of his progress while
importing (why did i break this?)
pentabarf import: live system handles times differently?