Extracts the version from an update zip or a KoboRoot.tgz.
Usage: kobo-versionextract [OPTIONS] PATH_TO_FW
Options:
-h, --help show this help text
PATH_TO_FW is either the path to a KoboRoot.tgz, libnickel.so, or a kobo update zip.
Note that kobo-versionextract only works with firmware 4.7.10413 and later.