Bump version to 0.5.1.dev
Bump version to 0.5.1.dev

franga2000/django-machina,ellmetha/django-machina,franga2000/django-machina,reinbach/django-machina,franga2000/django-machina,reinbach/django-machina,ellmetha/django-machina,reinbach/django-machina,ellmetha/django-machina