PROG-372: state type that accepts a hash key and field
PROG-372: return jedis resources
PROG-372: fix pipeline + transaction errors
PROG-372: workaround to allow pipelined transactional reads from redis
PROG-372: simplifying hash state a little

Apparently jedis transactions are already pipelined, so wrapping them in
a pipeline is a bit redundant.
Merge pull request #2 from vmcbos/aes-prog-372-hash-state

Aes prog 372 hash state