Adds a cfaSignInEx function that in turn calls cfaSignInGoogleEx, cfaSignInTwitterEx, cfaSignInFacebookEx, cfaSignInAppleEx, or cfaSignInPhoneEx that call observer.next({userCredential: userCredential}); so that the full credential is available to the web layer. Initiated in response to #159.
Adds a cfaSignInEx function that in turn calls cfaSignInGoogleEx, cfaSignInTwitterEx, cfaSignInFacebookEx, cfaSignInAppleEx, or cfaSignInPhoneEx that call observer.next({userCredential: userCredential}); so that the full credential is available to the web layer. Initiated in response to #159.