v0.4.1

• Add --no-human flag to print raw image size
• Fix issue with piped image input missing image ids
• Fix graphviz image IDs to match tree image IDs

$ sha1sum dockviz_*
823f2cd0fcc02faeff3689f2e688eadc5d280cdf  dockviz_darwin_amd64
837ed038f4d1b80fc04900f07fea8d4b3321de8c  dockviz_linux_amd64
07496afae47b7e55cc5deb362b0e03db44fc45fe  dockviz_linux_arm
$ sha256sum dockviz_*
e2a6dd062150f06dd4a20c3a3befa6a780bbfcb4c09403d93bd4e59576fd07d5  dockviz_darwin_amd64
8ccdf7727a044e485cb9000bc31aa2ef64f71cfbd624d13416a91d5359209871  dockviz_linux_amd64
f38788149854995638975479c0ebfd21b33c11e88017835eecc76bf42c948d7d  dockviz_linux_arm
$ md5sum dockviz_*
f803134d7b27fc6e95e272c48545f35c  dockviz_darwin_amd64
bf0ad64547c52f13d3485ae6a15b9649  dockviz_linux_amd64
f4adf17c7675978f4b29c875ec9b3dce  dockviz_linux_arm