Merge pull request #41 from riddlore/master

update own events, bugfix for overleap function
Merge pull request #42 from riddlore/master

update own events selection and overleap
Merge pull request #43 from riddlore/master

small fix
Merge pull request #44 from riddlore/master

Fix ifipdfs.
Merge pull request #45 from riddlore/master

styling
Fix hss parser, removed tags in description.
Added model for timetable.Parser and updated timetable.Source.
Updated admin.
Added datamigration for parsers.
Added data migration for sources.
Added getdata command.
Fixed search.
Bug fixes.
Updated commands.
update for summersemester