add lib/docker

Change-Id: Id03b9b566e962623774b79fa46adf28998c29716
Merge branch 'install-pip' into dt-test
Merge branch 'docker' into dt-test
Merge branch 'screen-stop' into dt-test
Merge branch 'doc-shocco-cleanup' into dt-test
Merge branch 'update-usb-tools' into dt-test