* Clarified required/optional wording. Parameters are REQUIRED unless otherwise stated.
* Implicit Flow: changed wording on redirect_uri requirement in the Authorization Request. Now reads "required IFF the client has pre-configured more than one value with the service provider".
* Diagram 3 was renamed to "Optional Steps" (from "Additional Steps"), as these steps may or may not be taken and may be done in any order. Added "openid" to the schema parameter in the UserInfo Request.