Created a new Uize.Color.ColorsHslTransformer module by factoring out code from the experimental color theme transformer example, in preparation for creating a new color theme transformer widget module.
Restructured this code so that the functionality implemented by this class can also be mixed in to other classes.
Created en encapsulated widget class for color set transformation.
Refactored this experimental example to use the new Uize.Widgets.ColorsTransformer.Widget class.
Use the small size, so there's room for explanation text.
Store just the tuples for the colors, and not the color object instances.