Facebook Mutual Friends (ListingDetailView)

Added a UITableView to list friends (from Facebook) to the
ListingDetailViewController. Will show mutual friends (if any) between
the PFUser.currentUser() and the poster. If the PFUser.currentUser() ==
poster, then will show a list of Facebook friends who are on the app.

Also, fixed the messageView (super view for the message textView and
‘Send’ button). Before, the messageView’s size never actually changed
while the textView did change. Additionally, didn’t check what would
happen if the user just entered a bunch of “return carriages”.

Now, added when the user clicks in the textView box, it instantly
resizes to the maximum size (to accommodate four lines of text) and
maximizes the super view to accommodate. It’s not pretty, but it works.

In the future, will want the textView to expand one line at a time
should the user type beyond the existing line. Tried to do this before,
but the adjustFrame() func didn’t work well — if implemented in
shouldChangeTextInRange, then the line expands AFTER the text wraps to
the next line. (One char delay.) If implemented in the UITextView’s
textViewDidChange, then a scroll occurs (to the bottom). Can scroll up
(just the little bit), and the view is fixed. Odd.