$ PYTHONPATH=./ ./bin/click-review ~/Desktop/shout_0.52.0_amd64.snap 
Errors
------
 - lint:is_squashfs
	(NEEDS REVIEW) squashfs pkg
 - lint:snappy_readme.md
	meta/readme.md does not exist
Warnings
--------
 - lint:snappy_unknown
	unknown entries in package.yaml: 'apps,description,summary,uses'
/home/jamie/Desktop/shout_0.52.0_amd64.snap: FAIL