Add support for label batch "quick entry" API

plus other general improvements to API core/master views and config

tailbone/api/master.py

@@ -62,6 +62,40 @@ class APIMasterView(APIView):
             return cls.normalized_model_name
         return cls.get_model_class().__name__.lower()
 
+    @classmethod
+    def get_route_prefix(cls):
+        """
+        Returns a prefix which (by default) applies to all routes provided by
+        this view class.
+        """
+        prefix = getattr(cls, 'route_prefix', None)
+        if prefix:
+            return prefix
+        model_name = cls.get_normalized_model_name()
+        return 'api.{}s'.format(model_name)
+
+    @classmethod
+    def get_permission_prefix(cls):
+        """
+        Returns a prefix which (by default) applies to all permissions
+        leveraged by this view class.
+        """
+        prefix = getattr(cls, 'permission_prefix')
+        if prefix:
+            return prefix
+        return cls.get_route_prefix()
+
+    @classmethod
+    def get_url_prefix(cls):
+        """
+        Returns a prefix which (by default) applies to all URLs provided by
+        this view class.
+        """
+        prefix = getattr(cls, 'url_prefix', None)
+        if prefix:
+            return prefix
+        return '/{}'.format(cls.get_route_prefix())
+
     @classmethod
     def get_object_key(cls):
         if hasattr(cls, 'object_key'):