removed empty "Documents" object from API "/shelters" response
removed empty "Documents" object from API "/shelters" response

toggle-corp/shelter-database,rodekruis/shelter-database,toggle-corp/shelter-database,rodekruis/shelter-database,rodekruis/shelter-database,toggle-corp/shelter-database,cedricbonhomme/shelter-database,cedricbonhomme/shelter-database,cedricbonhomme/shelter-database,cedricbonhomme/shelter-database,rodekruis/shelter-database,toggle-corp/shelter-database