* Clean up plasma subscribers on EPIPE
First pass at a monitoring script - monitor can detect local scheduler death
Clean up task table upon local scheduler death in monitoring script
Don't schedule to dead local schedulers in global scheduler
Have global scheduler update the db clients table, monitor script cleans up state
Documentation
Monitor script should scan tables before beginning to read from subscription channel
Fix for python3
Redirect monitor output to redis logs, fix hanging in multinode tests
* Publish auxiliary addresses as part of db_client deletion notifications
* Fix test case?
* Small changes.
* Use SCAN instead of KEYS
* Address comments
* Address more comments
* Free redis module strings
* Attempt to start web UI when starting Ray.
* Add instructions for using web UI to cluster documentation.
* Don't check if port 8080 is open.
* Remove print statement.
* Add function for driver to get address info from Redis.
* Use Redis address instead of Redis port.
* Configure Redis to run in unprotected mode.
* Add method for starting Ray processes on non-head node.
* Pass in correct node ip address to start_plasma_manager.
* Script for starting Ray processes.
* Handle the case where an object already exists in the store. Maybe this should also compare the object hashes.
* Have driver get info from Redis when start_ray_local=False.
* Fix.
* Script for killing ray processes.
* Catch some errors when the main_loop in a worker throws an exception.
* Allow redirecting stdout and stderr to /dev/null.
* Wrap start_ray.py in a shell script.
* More helpful error messages.
* Fixes.
* Wait for redis server to start up before configuring it.
* Allow seeding of deterministic object ID generation.
* Small change.
Stephanie Wang