misc/docker/release moved to misc/release because it did not really have
anything to do with making docker images, it just happens to use them.
misc/monthly.go has been moved to misc/release/make-release.go, and
reworked to be more generic.
misc/docker/dock.go has been trimmed down to only deal with creating
docker images
Fixes#1153
Change-Id: I4cb566551007300aefa6cb23714b90461f0e3e51
mpl