Merge branch 'release/0.5.2' into develop
add do_mix rpc
Merge pull request #20 from jubatus/feature/do_mix

add do_mix rpc
add accessors to get/set cluster name (fix #19)
Merge pull request #21 from jubatus/fix-19

add accessors to get/set cluster name (fix #19)
bump version
Merge branch 'release/0.5.3'