added documentation
added documentation

lvminmin/lvminmin.github.com,Soullivaneuh/SonataGoogleAuthenticator,sonata-project/GoogleAuthenticator,lucanos/GoogleAuthenticator.php,chregu/GoogleAuthenticator.php,AwardWallet/GoogleAuthenticator,rande/GoogleAuthenticator,denny0223/GoogleAuthenticator,lvminmin/lvminmin.github.com,Soullivaneuh/SonataGoogleAuthenticator,lvminmin/lvminmin.github.com,scottrobertson/GoogleAuthenticator