Add more comments that explain example & usage
Add more comments that explain example & usage

Change-Id: I4665cda50c2bbc8e0e323efb1baff653ace12579

jimbobhickville/taskflow,junneyang/taskflow,junneyang/taskflow,jimbobhickville/taskflow,pombredanne/taskflow-1,pombredanne/taskflow-1,citrix-openstack-build/taskflow,citrix-openstack-build/taskflow,varunarya10/taskflow,openstack/taskflow,openstack/taskflow,varunarya10/taskflow