Hello Facebook sample

This sample demonstrates some basic usage of the Facebook SDK, including:
- Using the FBLoginView class to display Login/Logout functionality.
- Using the FBProfilePictureView to display a user's profile picture.
- Using FBRequest to post a status update and a photo.
- Using FBFriendPickerViewController to display the user's friends and let them select a set of friends.
- Using FBPlacePickerViewController to display a list of nearby places and let the user select one

Using the Sample
Install the Facebook SDK for iOS.
Launch the HelloFacebookSample project using Xcode from the <Facebook SDK>/samples/HelloFacebookSample directory.
