Graphene-django-extras

1. Added ok field and errors field to **DjangoSerializerType** like on **DjangoSerializerMutation**.
2. Added possibility of filtering in those queries fields that return a list of objects.
3. Updated DRF compatibility.
4. Fixed bug with filters when use global **DEFAULT_PAGINATION_CLASS**.

1. Fixed error with **JSONField** reference on *Django==1.8.x* installations.

1. Added new settings param: MAX_PAGE_SIZE, to use on GRAPHENE_DJANGO_EXTRAS configuration dict for better customize DjangoListObjectType's pagination.
2. Added support to Django's field: GenericRel.
3. Improve model's fields calculation for to add all possible related and reverse fields.
4. Improved documentation translation.

1. Fixed bug on model fields with choices on an inheritance and the auto generated emun.
2. Improved ordering for showed fields on graphqli's IDE.
3. Added better descriptions to auto generated fields.

1. Fixed bug that added the auto generate **OneToOneField** field of an inheritance to model field list.
2. Added better descriptions to auto generated fields.

1. Fixed minor bugs referent to:
1.1. Error in queryset builder function for list resolvers.
1.2. Incorrect value for exclude_fields on converter function.
1.3. Errors for some fields types in GenericType and GenericInputType generations for Queries and Mutations.