Implementation of chat tutorial by tutorial face using android studio.
- http://www.tutorialsface.com/2015/08/building-your-own-android-chat-messenger-app-similar-to-whatsapp-using-xmpp-smack-4-1-api-from-scratch-part-1/
- http://www.tutorialsface.com/2015/08/building-your-own-android-chat-messenger-app-similar-to-whatsapp-using-xmpp-smack-4-1-api-from-scratch-part-2/
