…t time

Using Redis Pipelining is much faster than one-by-one enqueueing since there is a single Round-Trip-Time for the entire batch, instead of one RTT for each job. This improves the performance of enqueueing a large number of jobs considerably.

I decided against splitting large batches into multiple chunks (as recommended by https://redis.io/topics/pipelining#redis-pipelining), but mentioned it in the JavaDoc of this method. Thus, it is up to the user of this library to decide whether he wants to consider chunking the batch.

Not once per job in the list. Thus, I refactored the validation methods to be smaller. I decided against inlining `validateArguments()` method since I am not sure whether this is in line with the design principle of the author of this library.