The value for OAuth 2.0 'scopes' should be clear

[sichvoge]

Currently the spec is not clear what the value for scopes is. It only says that it is a list, but not whats the actual value is. To avoid confusion, we should make that following more clear. The value is a map where the key represents the name of the scope and the value is the description. For example:

scopes:
  admin: Admin scope
  user: User scope