add doc in README.rst

redis-export will export keys with given pattern to a json file (keys and

values both base64 encoded).

redis-import will import keys to redis.

redis-import will import those keys and values back to redis.

Implementation Detail

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- SCAN is used to iterate over keys with given pattern.

- DUMP is used to dump the key.

- RESTORE is used to restore a key. force-replace param is set to TRUE.

Exported file is a json list, each list item is of form (key, dump_value).

The redis key and dump value is encoded in base64 in order to fit in regular

json.

ChangeLog

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