* Split alot of code from eval.py into separate python files in bench/
* Introduce subprocess.Popen wrapper classes for server, clients, and the coordinator
* Drop the use of pssh
* make -l and --host mutual exclusive
* pass logger to run_cmd

This is needed since we use port 23 for ssh when our systems are in
evaluation mode

Implemented adjustements:
	s/emper/\emper{}/
	s/go/Go/
	s/tokio/Tokio