https://medium.com/@ezp127/laravel-5-4-native-user-authentication-role-authorization-3dbae4049c8a
http://www.uxbooth.com/articles/best-practices-for-search/
https://uxdesign.cc/design-better-forms-96fadca0f49c
http://goodui.org/
http://developer.android.com/google/gcm/notifications.html
http://www.davidgrant.ca/logging_django_site_magic_token
http://www.django-userena.org/
http://detectmobilebrowser.com/