Scroller: scroll bar dimensions add to right and bottom offsets instead of replacing the padding.
Changed references in documentation from signals to events.
docs tweaks
List, GroupedList: better scroll policy when creating a default layout.
Scroller: supports contentScaleFactor for mouse wheel scrolling (closes #368)
ListCollection: added removeAll(), addAll(), addAllAt(), and contains() (closes #367)
ScreenNavigator: calling clearScreen() during a transition no longer causes a stack overflow (closes #362)
ScrollText: better handling of visible and alpha
ScrollBar, SimpleScrollBar: step rounding accounts for minimum and maximum if they're not on the step (closes #366)
Panel: header may be any IFeathersControl. Still defaults to Header, though.
Scroller: scrollerProperties uses a proxy again to allow @ syntax for sub-component properties.