Add convenience script to follow progress of experiments

[hiddely]

Script should ssh into a specific instance of an experiment and follow standard output/error of an experiment

Steps:

1. Doe should output a helper config json with the hostname of the currently running experiment.
2. Helper script should read in this config file, as well as the current suite and id to read the suite state.
3. Helper script should ssh into the relevant machine and tail the relevant file (possibly user-specified)

[nicolas-kuechler]

Maybe make tail suite=<SUITE> id=last should present a list of hosts and the currently running experiment run with a choice to tail into one of the hosts stdout and stderr.

(1) simple-01   xyz
(2) simple-02   xyz