add static accomodation options.
i18n for registration.
add models/registration/attributes to i18n files and use it automagically from formbuilder.
i18n for seminar show view.
specify licenses in gemspec and include MIT and GPL3 in full text.
reorder gemspec
include artwork with background source.
add, use i18n and titles.
count youth/children/adults in registration, add spec.
rework registration partial, modify model.
remove room parameterization hash, not needed.
include category description in show view, if present.
show further seminar infos only if seminar in past.