dask_ssh.sh script is broken

[AlexSchuy]

With the change to python 3, the dask_ssh script is broken, as it uses click, which has encoding issues with python 3. If you attempt to source the script, you will see a message suggesting that certain environment variables be modified to remedy the issue, although this has not yet worked.

There are two possible solutions: one, investigate the click issue further and attempt a resolution. Two, attempt to use one of the other methods listed on https://distributed.readthedocs.io/en/latest/setup.html.