Merge pull request #20 from shalako/master

polishing services docs
Update documentation for dashboard sso feature and api v2.3 [#65774862]
Specified v169 as minimum requirement for SSO feature.
Merge pull request #21 from dsabeti/v2.3

Specified v169 as minimum requirement for SSO feature.
Merge pull request #22 from cloudfoundry/v2.3

V2.3
change semi-colon to comma in api.html
Minor corrections in Service API v2.3 documentation

[#65774862]
Clarify how services should implement the Dashboard SSO flow

[#70597708]
Merge pull request #23 from cloudfoundry/dashboard-sso-revisions

Clarify how services should implement the Dashboard SSO flow
Re-organizing Dashboard SSO documentation

- Added information about scopes, including our new scope:
  cloud_controller_service_permissions.read
- Split into sections regarding Registering the Dashboard, OAuth2 Login
  Flow, and Reference Implementation sections.
changed title of sso doc