* support to distribute a folder alongwith its subfiles/subfolders

* job_shutshown check

* remove outdated annotation

* len(dirs)

* yapf

* add get_subfiles_recursively function to parl.utils

* hmm...

* modify a little

* rewrite

* modify

* first commit

* remove the default setting that unables GPUs in the job node

* Update job.py

* update paddle_gpu_test.py

* support jupyter

* Update utils.py

* Update utils.py

* fix #370

* add unit tests for importting submodule in xparl

* add comment

* revert scripts.py

* yapf

* unit test

* fix relative path bug

* read files using relative path

* remove print

* update CMake

* add try times

* fix the bug in log_server_test.py

* fix relative path bug&add unit test

* update utils.py

* update Cmake

* fix pyc bug

* Update utils.py

* redirect stdout to log file while initializing the remote actor instance

* add test for catching output in  `Actor.__init__`

* fix the bug of recursive creating actors

* add comment

* update comment

* rename test files

* fix workspace bug

* fix the bug of distributing files

* update comment

* ban passing a absolute path