use class based view for YUI demo.
use class based view for YUI demo.

aorzh/django-graphos,aorzh/django-graphos,vivek8943/django-graphos,vivek8943/django-graphos,vpistis/django-graphos,aorzh/django-graphos,sheepeatingtaz/django-graphos,vpistis/django-graphos,sheepeatingtaz/django-graphos,agiliq/django-graphos,vivek8943/django-graphos,agiliq/django-graphos,vpistis/django-graphos,sheepeatingtaz/django-graphos,agiliq/django-graphos