Add more detail to the README
Add more detail to the README

Change-Id: I7fc38226d922a894d2ae9bef1de54397bec00467

JioCloud/stevedore,nelsnelson/stevedore,mandeepdhami/stevedore,varunarya10/stevedore,varunarya10/stevedore,nelsnelson/stevedore,mandeepdhami/stevedore,JioCloud/stevedore,openstack/stevedore