Write new file contents to a temporary file and then rename over the
target file to avoid data loss in the unlikely event there's an error
writing the new file contents or the process is interrupted.
Resolves#416.
Somehow the step of automatically obtaining the right address to apply
to slave.public_address, and asking for the master url and token for ctl
installations was implemented but the code to actually set it in the
relevant config was forgotten.
Provide a create package for the clusterio npm org which gathers the
necessary details to install a working cluster either as standalone or
as separate nodes.
Hornwitser