Add a custom manager to filter private and unpublished stuff (#39)

* Implement a customer manager for flatpages

* Implement public manager for private objects

* Add support for unpublished objects in roster and consist

* Add support for unpublished objects in bookshelf

* Update filtering on REST views

* Use uuid in urls.py

* Increment version

ram/metadata/models.py

@@ -7,6 +7,7 @@ from django_countries.fields import CountryField
 
 from ram.models import Document
 from ram.utils import DeduplicatedStorage, get_image_preview, slugify
+from ram.managers import PublicManager
 
 
 class Property(models.Model):
@@ -23,6 +24,8 @@ class Property(models.Model):
     def __str__(self):
         return self.name
 
+    objects = PublicManager()
+
 
 class Manufacturer(models.Model):
     name = models.CharField(max_length=128, unique=True)