Add a simple geard backend

When started with the geard backend:

    docker -H <swarmd> run --name <some_name_longer_than_4_char> -p 8080:10000 pmorie/sti-html-app
    docker -H <swarmd> start <name>
    docker -H <swarmd> stop <name>

signed-off-by: Clayton Coleman <ccoleman@redhat.com> (github: smarterclayton)