Added simple Job management functions to Job.py

Added simple execute, stop, continue functions to Job.py
Wondering how this program should work.
 - Should it run in Foreground?
 - Background (Then how should we reap processes?)

As of my first thoughts on this program, I was thinking
about a background process, which runs behind my back,
but if I query to the daemon, it prints out the status, etc
Maybe it needs both modes.
Maybe the Daemon can make a process to run in the FG

However, this shouldn't need to run in parallel,
at least, not as of now, so reaping finished processes
may be easier