fixing... if pred job has multiple instance, only one worker is selected as a input target. not fixed yet...
small fix
Merge branch 'parallel' of github.com:laysakura/shellstreaming into dev
Merge branch 'dev' of github.com:laysakura/shellstreaming into dev

removes some noisy log

Signed-off-by: Sho Nakatani <lay.sakura@gmail.com>

Conflicts:
	example/02_FilterSplit.py
	shellstreaming/ostream/io_stream.py
	shellstreaming/scheduler/worker_sched_single_thread.py
	shellstreaming/worker/worker_server_service.py
adds operator.ShellCmd