Fix encoding for python 3 (the JSON object must be str, not 'bytes'), compatible with python 2.X (tested with python 2.7)
Fix encoding for python 3 (the JSON object must be str, not 'bytes'), compatible with python 2.X (tested with python 2.7)

mverteuil/django-dashing,talpor/django-dashing,quevedin/django-dashing,quevedin/django-dashing,swiftstack/django-dashing,talpor/django-dashing,talpor/django-dashing,mverteuil/django-dashing,swiftstack/django-dashing,luto/django-dashing,mverteuil/django-dashing,quevedin/django-dashing,luto/django-dashing,swiftstack/django-dashing,luto/django-dashing