Allow to use bulk_update in models whose pk is an uuid.

[arnau126]

Fixes issue #52.

[arnau126]

Tests fail for django version <= 1.7 because models.UUIDField came up at 1.8.
What should we do?

• Drop support for these old django versions,
• or adapt tests to only test the uuid pk if django version >= 1.8?

Any thoughts, @aykut ?

[aykut]

Thanks a lot for your support. I think it is better to workaround with the django-uuidfield package to cover django < 1.8, https://github.com/dcramer/django-uuidfield

try:
    from django.db.models import UUIDField
except ImportError:
    from uuidfield import UUIDField

What do you think?

[arnau126]

Yes, great idea. Done.

Even though, I think that a major release (django-bulk-update==2.0.0) is needed soon which drops support to django<=1.7.

I've added a commit with tox.ini, which is very useful for testing with different packages versions.

Please, let me know if any change is needed.

[aykut]

Thank you very much. You are right about dropping support for django<=1.7, if you would develop that, I am more than happy to merge it :).

[arnau126]

Thanks for the release, it will be very helpful for the project I'm working on.

Next week I'll try to work in dropping support for django<=1.7.