Support Server Command Set

[timbarker]

Support the server command set:

http://redis.io/commands#server

Acceptance Criteria

The following commands should be supported:

• BGWRITEAOF
• BGSAVE
• CLIENT KILL
• CLIENT LIST
• CLIENT GETNAME
• CLIENT PAUSE
• CLIENT REPLY
• CLIENT SETNAME
• COMMAND
• COMMAND COUNT
• COMMAND GETKEYS
• COMMAND INFO
• CONFIG GET
• CONFIG SET
• CONFIG REWRITE
• CONFIG RESETSTAT
• DBSIZE
• DEBUG OBJECT
• DEBUG SEGFAULT
• FLUSHALL
• FLUSHDB
• INFO
• LASTSAVE
• MONITOR?
• ROLE
• SAVE
• SHUTDOWN
• SLAVEOF
• SLOWLOG
• TIME