Moved label to addon
Add Rect.AddPoint
Added Rect.IsInside( Vector2 pos )
Added Panel.PanelPositionToScreenPosition
Added IEnumerable<Panel> Panel.FindInRect( Rect box, bool fullyInside )
Added Panel ondragselect event
Added internal label Selectable
Added panel.IsInside( Rect rect, bool fullyInside )
Added Panel.AllowChildSelection
Merge branch 'master' of sbox