1) It's incr not inc on the redis client, so renamed the calls everywhere
2) Redis returns bytes/string rather than an int if the value stored is an int. Cast the result to an int before use. Not you can set up the GET to do this transparently but I've not done this as we *may * use GETS for non-int and the callback sets up the cast for the connection not the call.
- Uses Redis cache to check for current count
- If not present then sets the value based on the database state
- Any Redis errors are swallowed. Cache failures should NOT fail the request.
