Urnik DZRS.
Import drzava/dzrs/urnik/ to cal_event
Merge pull request #9 from Smotko/events

Import drzava/dzrs/urnik/ to cal_event
Basic calendar
Fixed end time, check for duplicates
Actual icalendar data
Merge pull request #10 from Smotko/ical

Ical
Pin versions.
Merge branch 'master' into events
Add more tests.
Dodan test za koledar, premaknjen ical koledar na /koledar/ical/.