Add the ACFacebookAudienceKey in the native facebook provider
Merge pull request #41 from alexito4/master

Support Facebook audience for system provider.
Merge pull request #40 from Yosee/foursquare-provider

Fixes Foursquare API version bug.
Merge branch 'sso' of https://github.com/Yosee/SimpleAuth into sso
Change single sign on provider to protocol instead of class.
Merge branch 'master' of github.com:calebd/SimpleAuth into facebook-sso

Conflicts:
	SimpleAuth.xcodeproj/project.pbxproj