Added info on APB maintainer Restructured a bit the Ansible roles part to have another section with current roles and example
Added info on APB maintainer
Restructured a bit the Ansible roles part to
have another section with current roles and example

This patch should cover mostly the skeleton of the
document while we'll handle specific parts in seperate issues.

Also,the repo is going to undergo a massive refactoring
(see https://github.com/kubevirt/kubevirt-ansible/issues/32)
So the section on roles layout might be blocked until that is done.

Signed-off-by: Eyal Edri <0c20e4549535c289cc2166cc92c7b892ceb19f3b@redhat.com>

kubevirt-incubator/kubevirt-ansible,kubevirt-incubator/kubevirt-ansible