Support ACL in Object Store

[dbauszus-glx]

Currently the ACL must be held in a PostgreSQL database. With other spatial becoming more prevalent it might be useful to support other ACL in object stores such as Firebase.

We would at first require some logic to send signed requests to an object store.

We probably need some module which translates between SQL and JSON object CRUD.

All the calls to the ACL module would need to use JSON CRUD with the request then being sent to either a SQL connector or object store connector.