Adds ga_appname config setting
Require current code to enable/disable 2fa
Merge branch 'master' of https://github.com/felipecsl/devise_google_authenticator into felipecsl-master
Provides configurable Appname config & requires user's token when enabling/disabling QR code
Merge branch 'felipecsl-master'
Added bypass displayqr option during registration/sign-up