Add worker_manager for clustering (#239)
Add worker_manager for clustering (#239)

It's about issue #241 (Node.js should use multi cores.)
worker_manager.js will make children processes for load-balancing by using
cluster module.
sapzape/absolute,lunchclass/absolute,nadongguri/absolute,lunchclass/absolute,nadongguri/absolute,sapzape/absolute,nadongguri/absolute,lunchclass/absolute,sapzape/absolute