add keystone configuration instructions to manual install docs

Change-Id: I50aed064580a715b741e4ecf6bb7e74bdcdfd514
Fixes: bug 1104062
include a copy of the ASL 2.0

To be consistent with other OpenStack projects,
and to conform with downstream packaging norms.

Change-Id: I6fff3b25d9724791c377afe7aa97dd691dce60d2
Merge "add keystone configuration instructions to manual install docs"