Liferay Mobile SDK - Android

Hey Bruno,

I've completed the Intro and Android sections for the Mobile SDK chapter. Could you review my text and verify that everything is correct?

For the Android section, I changed the code snippets to your sample app. I did this because we want to show the user how to access Liferay services, and then demonstrate using the service with a simple example. Therefore, I also created a basic tutorial for setting up and accessing users from your sample app using the Emulator.

Let me know if anything is incorrect or if you have any suggestions. Thanks!