shib_auth 6.x-3.x-dev

- added authorisation (aka 'auto-group') feature
- Following coding standards, add doxygen documentation and even a small Install fix
- Redesign the whole login procedure
- Make debug mode available without going offline-Using custom DEBUG path
- Fix 'Access Denied' after being redirected back to Drupal
- Allow admins to change logout redirect url
- Optionally destroy Drupal session on Shibboleth session expiry.
- Remove shib_auth created user from authmap when deleting user and some additional help message to the administrator
- Deny creating the user account if the email is already used
- IIS bugfix, See issue 361610
- Change some default value to more adequate one's
- Fix keeping session in case of local user account while destroy drupal session with idp session is enabled