fix graph_models output with pygraphviz for versions earlier then 0.36 (distro's like ubuntu ship with this old version)
fix graph_models output with pygraphviz for versions earlier then 0.36 (distro's like ubuntu ship with this old version)

tectronics/django-command-extensions,Dougoc/django-command-extensions,Dougoc/django-command-extensions,google-code-export/django-command-extensions,Dougoc/django-command-extensions,katakumpo/django-command-extensions,niceban/django-command-extensions,katakumpo/django-command-extensions,google-code-export/django-command-extensions,niceban/django-command-extensions,tectronics/django-command-extensions,tectronics/django-command-extensions,niceban/django-command-extensions,katakumpo/django-command-extensions,google-code-export/django-command-extensions