deny edit and import from csv if period ends
replace nil lecturer
docket sorting by lecturers
chenge temp lecturer name to surname
add kind to docket
add graduate to period
add delayed_job
add period_id and course to group; group belongs to period
show link to dockets if dockets in period any
import data by periods
show dockets only by period
docket enum localization
import attendances only for kt_1 and kt_2