Docker 1.8 released

The 1.8release of the Docker container system is out, with a number of newfeatures. "Docker Content Trust is a new feature in Docker Engine1.8 that makes it possible to verify the publisher of Docker images. When apublisher pushes an image to a remote registry, Docker signs the image witha private key. When you later pull this image, Docker uses the publisher'spublic key to verify that the image you are about to run is exactly whatthe publisher created, has not been tampered with, and is up todate."