Added RuntimeWarning about an incomplete support for Django 1.8
Added RuntimeWarning about an incomplete support for Django 1.8

django-salesforce/django-salesforce,hynekcer/django-salesforce,chromakey/django-salesforce,hynekcer/django-salesforce,chromakey/django-salesforce,chromakey/django-salesforce,django-salesforce/django-salesforce,hynekcer/django-salesforce,philchristensen/django-salesforce,django-salesforce/django-salesforce,philchristensen/django-salesforce,philchristensen/django-salesforce