Hiroki KUMAZAKI

Results 5 issues of Hiroki KUMAZAKI

- [x] Compiled - [x] Linked - [x] All tests passed - [x] Lint passed - [ ] Modify travis.yml

This PR is to fix [jubatus:issue#596](https://github.com/jubatus/jubatus/issues/596) this PR is WIP.

fix [#640](https://github.com/jubatus/jubatus/issues/640) It needs large refactoring. Construction of `driver::foo_bar` must take argument `driver::foo_bar_config` only. It helps reconstruction of `driver` object and clarify the dependency of `json::config` library.

In my environment, `cap production sidekiq:start` dies immediately. The capistrano's boot up sidekiq via below command. ``` $ sidekiq --index 0 --pidfile /opt/my_application/shared/tmp/pids/sidekiq-0.pid --environment production --logfile /opt/my_application/shared/log/sidekiq.log --config /opt/my_application/current/config/sidekiq.yml -r...

Just fixed. without this fix, that sample code alerted as ``` NameError: undefined local variable or method `events' for main:Object ````