Example usage:
$ ./factor -run=tools.cal
    August 2016
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			 | 
			||
|---|---|---|
| .. | ||
| cal | ||
| cat | ||
| copy | ||
| dns | ||
| echo | ||
| grep | ||
| image-analyzer | ||
| move | ||
| seq | ||
| time/struct | ||
| tree | ||
| uniq | ||
| which | ||