Redis list enumerator

[anuragshopify]

What?
An enumerator for reading off of a list in redis. It could use the LRANGE command to read values off of the list .

Why?
There are cases where before enqueuing a job a client pushes some data into a redis list/set and the job then reads all the set contents. The set could get pretty large and having a list enumerator would deal with this sort of situation.

If this seems like a reasonable use case I'd be happy to make the changes to support it.