New Commands

RATELIMITSET <bucket> <limit> <seconds>, create a new $bucket that accepts num of $limit of actions per the specified num of $seconds, it will returns 1 for success.
RATELIMITTAKE <bucket>, do an action in the specified bucket and take an item from it, it will return -1 if the bucket not exists or it has unlimited actions $limit < 1, 0 if there are no more actions to be done right now, reminder of actions on success.
RATELIMITGET <bucket>, returns array [$limit, $seconds, $remaining_time, $counter] information for the specified bucket
KEYS [<regexp-pattern>]
HKEYS <HASHMAP>
ECHO [<arg1> <arg2> ...]
INFO

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