Add command line arguments to start/stop the tap timer and exit#3

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hmoffatt wants to merge 3 commits intoscottmckenzie:masterfrom

hmoffatt:run_arg

Commits on Dec 4, 2018

allow timer to be started and app exited from command line

hmoffatt
authored and
Hamish Moffatt
committed
add stop command, always auto exit if run/stop passed rather than through explicit command
hmoffatt
committed
fix logic for stop command
hmoffatt
committed