Tests about splittable commands
proposition for #23 by multiplexing MSet(). Demultiplexing is not necessary for this command since MSET allways returns "OK".
Adapting SplittableCommand for multiplexing, and testing in AbstractClientTest
Solving problem with ChildReply
commit with @Ignore for Travis to pass
adding a WARN when sending a splittableCommand when hashing is disabled
Merge pull request #27 from loloreyn/multikeyed

MultiKeyedCommand  / SplittableCommand and support for it in RedisClient