Added url field to BaseFile serializers
Merge branch 'master' of github.com:pulilab/django-medialibrary

# By Fekete Gyorgy
# Via Fekete Gyorgy
* 'master' of github.com:pulilab/django-medialibrary:
  test for new get API permission filter
  by_user commit again
  Merge branch 'master' into master
  filter queryset by user
  by_user Manager
merged Gyuri's changes, and pushing version number