Refs #41 - django_downloadview.sendfile is a PathDownloadView (was StorageDownloadView). PathDownloadView.get_file() raises FileNotFound if file does not exists.
Refs #41 - Added 'mimetype' and 'encoding' arguments to 'DownloadMixin' => supported all arguments of original sendfile() function. Added documentation about migrating from django-sendfile to django-downloadview.
Merge pull request #73 from benoitbryon/41-django-sendfile

Closes #41 - django_downloadview.sendfile is a port of django-sendfile's sendfile function