Don't load needress module
Use downcase command name (ex. not createTable, but createtable)
Simplify implementations around response builders for REST API
Add socket.io adaptor
Support both server and handler by utils.setupServer()
Register socket handlers automatically by app.kotoumi()
Use server created by app.kotoumi() for testing
Shorten method name:
createRESTHandler =>
createHandler
(because, "REST" is already indicated by the context.)