Remove obsolete/undocummented command line switches

Spotted undocummented/obsolete switches '-s' and '-f' equivalent to
'start' and 'stop' respectively. Removing for convenience.

Change-Id: I17f46dbd0a18ef6669c3b9c8372845bab635d172
Merge pull request #27 from pjanicki/obsolete_switches

Remove obsolete/undocummented command line switches