My first ansibles roles.

Signed-off-by: Jean-Denis Vauguet <jd@vauguet.fr>
READMEs everywhere!

Signed-off-by: Jean-Denis Vauguet <jd@vauguet.fr>
Install roles under a namespace.

Signed-off-by: Jean-Denis Vauguet <jd@vauguet.fr>