* add favicon

* Sleep longer for unittest.

* fix unittest bugs

* increase sleep seconds after job_memory error

* fix css max-width bug

* check if monitor_port is used

* change master log dir to .parl_data/master/port

* Add docs/parallel_training/features.rst

* rename feature.rst to overview.rst

* Add xparl status & @remote_class(max_memory)

* fix yapf error

* use new remote/tests

* reply job_memory_info to client heartbeat

* add cluster_status_test.py

* update overview.rst

* Update docs

* Add parl monitor.

* Add clustermonitor.py

* Fix thread safety bug.

* Fix js bugs.

* Fix End of Files.

* fix cluster_test bug

* yapf error

* fix bugs in tests/job_center_test.py

* fix bugs in tests/job_center_test.py

* add test_cluster_monitor.py

* add worker.exit in test_cluster_monitor.py