Stopped doing some things in the Redis client

The client was looking for the renamed config command, but we ended up
not needing to do this. It also had a config class but that was only
being used in the constructor so I zapped it. Also removed some more
constants from constants.h that were only used in a few places.
Merge pull request #89 from TimSimpsonR/backup-redis

Stopped doing some things in the Redis client