fail on image not found without panic; add extra chmod case to test d…

…ockerfile

ensure tmp image is cleaned up on crash (addresses part of wagoodman#58)

added efficiency test

keybindings belong to a specific view (fixes wagoodman#55)

use stable uuid def (closes wagoodman#31)

unaccounted whiteout files should not be fatal

support goreleaser driven docker build

bump version

truncate inefficiencies report (fixes wagoodman#27)

pin docker client version