Add test for zk; read more than 1kiB data
Modify buffer size to 1MiB
Fix zk::read against data being NULL
Use zoo_exists in zk::read to get buffer size
Fix zk::read against data being empty
Fix error message for zk::read
Rewrite zk::read as loop
Output log when reload in zk::read
Merge branch 'release/0.5.1' into develop
document oniguruma-devel requirement for RPM build
Merge branch 'master' into develop
#639 remove unused fields and functions.
Removed an unused constant (#347).
Merge branch 'master' into develop
Made compressor class' derived class' members to have appropriate accessibility (#347).
Made class bit_vector_nearest_neighbor_base and its derived classes to have appropriate accessibility (#347).
Made class local_storage's members to have appropriate accessibility (#347).
Merge pull request #643 from crow-misia/remove_unused_fields_functions

Remove unused fields and functions.
fix classname for jsonconfig::config::iterator::key
Merge pull request #624 from gintenlabo/allow-config-file-bigger-than-1kiB

Allow config more than 1kiB in distributed mode (fixes #617)