openid_provider 6.x-1.0-rc3

This is yet another bugfix release! Onwards to the real 1.0 :)

* 7bf6040 - by David_Rothstein: properly sign nickname and email since we send them out in auth_response (#1441586: SREG and AX keys aren't signed, so they are ignored by Drupal OpenID clients)
* cfb8c4f - Revert "remove unused unsolicited assertion code" (#1471324: Missing openid_provider_authentication_response() function)
* b4237ca - optimization: delete stale associations in cron
* fd79f33 - fix association verification
* 36e6958 - remove unused unsolicited assertion code
* 26473eb - fix warnings in authentication_response()
* 1cd7b1b - complete the private association support (#506530: Private association support)

Known issues:

#1473078: Fix for installation error (missing curly brace) - parse error because of missing close bracket.