- [`DJANGO_CHUNK_UPLOAD_NULL_USER`]([https://github.com/jerinpetergeorge/django-chunk-uploaddjango_chunk_upload_null_user]) settings variable added, Ref [Issue 3](https://github.com/jerinpetergeorge/django-chunk-upload/issues/3)
- removed `DJANGO_CHUNK_UPLOAD_MIMETYPE` in favour of **`DJANGO_CHUNK_UPLOAD_CONTENT_TYPE`**