Several minor changes:
* Add mycroft-start and mycroft-stop, which can be used as commands anywhere
if the user has added this to the PATH. They are shortcuts to the
start-mycroft.sh and stop-mycroft.sh scripts.
* Add to the mycroft-help command reference
* Add "reset" parameter for start-mycroft.sh, which forces a service restart.
If a service is currently running, it will not restart by default anymore.
* Make the 'enclosure' service part of 'all' regardless of platform. This
makes sense not that it can handle a remote GUI connection.
* BUG: mycroft-stop would sometimes show odd messages if the skill process
had active child processes.
Steve Penrod