• [Common] Adds support for IBDesignable to MarqueeLabel - while you won't see the scrolling animation, IBInspectable properties set via Interface Builder will be shown. The leadingBuffer, trailingBuffer, and fadeLength properties are probably the most useful!
• [Swift] Fixes setting scrollRate and scrollDuration IBInspectable properties. Turns out Optionals are not compatible with IBInspectable. Rather than returning nil if unused, these properties will now return 0.0 (i.e. scrollRate will be 0.0 if you set a scrollDuration value, and vice versa)
• [Swift] Fixes two self-referencing properties, adjustsFontSizeToFitWidth and minimumScaleFactor. Setting either of these properties would have resulted in a crash.