Fixing a few serialization errors

Changed for Django 1.9.11, model updated and migrations.

Changed for Django 1.9.11.

Adds missing progressbar img

Version 0.2.1: Better unicode encoding of the file's name

Version 0.2

Minor updates

Added acceptable types aggregation to registry

Made url attribute callable

Added an app config

Version 0.1.1: adds migrations

Added Migrations

Updating the readme

Initial commit