Add “taggable_friends” and “invitable_friends” version 2.0 of Graph API support and fixed check marker not show in iOS 7 issue for FBFriendPickerViewController

There is no way to list taggable friends and invitable friends through FBFriendPickerViewController.
So, Add “taggable_friends” and “invitable_friends” version 2.0 of Graph API support for FBFriendPickerViewController.

The check marker of FBFriendsPickerViewController can’t see in iOS 7.
So, Setting the tint color as system color to the table view.