lily-rebuild-pdfs --version (return code: 0)
lily-rebuild-pdfs 0.2.2
lily-rebuild-pdfs --help (return code: 0)
usage: lily-rebuild-pdfs [-h] [-v]
Rebuild all pdfs missing in the 'pdfs' subdiredtory
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit