Reopened this merge request with the changes on a separate branch.

When running make migrations for my project I noticed that an additional migration was being created for this app. The only difference that I saw between this migration and the initial migration is that the initial migration uses byte strings for the choices.

Looking at the history for the models file it doesn't look like the state choices were ever byte strings. It looks like they were added to the migration when the migrations were changed to be compatible with Django 1.8.

When running make migrations for my project I noticed that an additional migration was being created for this app. The only difference that I saw between this migration and the initial migration is that the initial migration uses byte strings for the choices.

Looking at the history for the models file it doesn't look like the state choices were ever byte strings. It looks like they were added to the migration when the migrations were changed to be compatible with Django 1.8.

This commit introduces a backward compatible import where the warning is removed for django1.8 and ensure that the project will run on Django1.9 when the support for GenericForeignKey will be removed from the generic module in contenttype.

Get Django version from django.VERSION. django.get_version() is not working in Django 1.10 since either '1.10 > '1.8' or '1.10 > '1.9' is False.

When running on EC2 with IAM, the boto derives the AWS_* variables from the instance itself automatically. They are not required to be set explicitly.

Notifications for jobs that had errors were breaking when the message dictionary did not contain the messageDetails key. So for jobs with errors we add the entire message dictionary to the job. This also provides us with more useful debugging information.

Django was still throwing the Removed in Django 1.9 warning for the GenericForeignKey import in the models, if your django version was exactly 1.8. Changing the version check to be >= fixes it.

RemovedInDjango19Warning: django.contrib.contenttypes.generic is deprecated and will be removed in Django 1.9. Its contents have been moved to the fields, forms, and admin submodules of django.contrib.contenttypes.
  from django.contrib.contenttypes.generic import GenericForeignKey

On Django1.8, we get a deprecation warning about GenericForeignKey and it will be enforced in Django1.9

This patch will lower the minimum supported Django version to 1.3, by modifying urls.py to import from django.conf.urls.defaults if django.conf.urls does not have url and patterns.

As someone who is stuck at 1.3 :cry:, this is a very trivial but also very useful change.

There is a small typo in README.rst.

Should read receive rather than receieve.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

What are the relevant tickets?

fixes https://github.com/StreetVoice/django-elastic-transcoder/issues/21 we fixed it on our fork https://github.com/mitodl/django-elastic-transcoder/pull/4

What's this PR do?

It fix ForeignKey which requires 2 parameter from Django 2.0. But before that only one param was mandatory

How should this be manually tested?

Run migration with Django 2.0

@pdpinch

traceback (most recent call last):
  File "./manage.py", line 12, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 347, in execute
    django.setup()
  File "/usr/local/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/usr/local/lib/python3.6/site-packages/django/apps/registry.py", line 112, in populate
    app_config.import_models()
  File "/usr/local/lib/python3.6/site-packages/django/apps/config.py", line 198, in import_models
    self.models_module = import_module(models_module_name)
  File "/usr/local/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/src/ui/models.py", line 11, in <module>
    from dj_elastictranscoder.models import EncodeJob
  File "/usr/local/lib/python3.6/site-packages/dj_elastictranscoder/models.py", line 7, in <module>
    class EncodeJob(models.Model):
  File "/usr/local/lib/python3.6/site-packages/dj_elastictranscoder/models.py", line 16, in EncodeJob
    content_type = models.ForeignKey(ContentType)
TypeError: __init__() missing 1 required positional argument: 'on_delete'

cc @pdpinch