Add views for group heads to ListView
UIScrollView sometimes have a UIImageView in there. Why? Filter it out.
Actually render group view headers
Alternative implementations of topView and bottomView
UIView stylers: clipToBounds, textColor, textAlignment, tag; UIView methods: x, y, x2, y2, frameInWindow;
ListView methods to track the top group view and transitions from one top group to another
Add LIGHT_GRAY color
Add centerHorizontally/VerticallyInSuperview
Handle UIButtons in text() and textColor()