Add translatable label to the label admin method.
Add access association from DocumentVersionDriverEntry to
document version.
Enclose process method and event commit in a transaction.
Update process method to not error out if EXIF tool
is not found.
Update views and tests to use ExternalObjectMixin and
comply with MERCs 5 and 6.
Signed-off-by: Roberto Rosario <Roberto.Rosario.Gonzalez@gmail.com>
dcea32ae38