Line wrap README, revise IRC channel to #openstack-barbican
Line wrap README, revise IRC channel to #openstack-barbican

Change-Id: Id7840adb5d8863e668d2ab23820fd1346c349f53

cloudkeep/barbican,MCDong/barbican,cloudkeep/barbican,cneill/barbican,MCDong/barbican,openstack/barbican,jmvrbanac/barbican,openstack/barbican,jmvrbanac/barbican,cneill/barbican