Iterate over FieldFile directly
Ignore file_sha256sum field in form
Fix edit book
Add a missing import statement
Fix reference to nonexistent object
Move static files from static_media/ to static/
Remove deprecated ADMIN_MEDIA_PREFIX
Enable staticfiles contrib app
Use STATIC_URL in templates
Fix path to static files
Merge pull request #34 from migonzalvar/fix-upload-and-edit-book

Fix upload and edit book
Merge pull request #35 from migonzalvar/fix-addepub

Fix addepub
Merge pull request #36 from migonzalvar/migrate-static

Migrate static files to use django.contrib.staticfiles