upgraded requirement to Django 1.11.2, Pillow 4.1.1, PyYAML 3.12, django-tinymce 2.6.0 and python-dateutil 2.6.0
upgraded requirement to Django 1.11.2, Pillow 4.1.1, PyYAML 3.12, django-tinymce 2.6.0 and python-dateutil 2.6.0

radio-helsinki-graz/pv,nnrcschmdt/helsinki,nnrcschmdt/helsinki,radio-helsinki-graz/pv,nnrcschmdt/helsinki,radio-helsinki-graz/pv