0.1.0: 
	* Added additional logging messages for end of alarm
	* implemented SIGINT (Ctrl-C) handling to exit gracefully

0.0.5:
	* initial working version
	* show alarmtime in startup

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issues
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* alarmtime 15min -> 30min
* max7219 1st second of alarm 100% brightness issue
* address more than the 1st 10 tracks
* more clear log entry when demoing sample track editing tracklist
* change 5 seconds of track demo to on-off click method

todo
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add SIGHUP handling for reload config
changes config file format to json