Don't crash if ical does not have summary or description fixes #576
Don't crash if ical does not have summary or description fixes #576

hacken-in/hacken-in,hacken-in/website,hacken-in/website,hacken-in/website,hacken-in/hacken-in,hacken-in/website,hacken-in/hacken-in,hacken-in/hacken-in