Implement remaining commands

For certain commands that need to be directed at a node
(CONFIG, CLIENT, SCRIPT, etc), the syntax can be complicated
and highly variant.  For this reason, these remaining commands
have been implemented in a generic way, where users will rely
on the error message from Redis to figure out what went wrong.

All of the commands take our standardized "node" argument which
can either take the form of a string key, or Array(host, port).