Added support for style property HTML bindings.
Updated Uize.Widgets.ColorInfo to use the htmlBindings static method.
Updated Uize.Widgets.ColorSwatch to use the HTML bindings feature.
Updated Uize.Widget.ProgressBar.Widget to use HTML bindings.
Updated Uize.Widgets.Slider.Widget to use HTML bindings.
Added some minimal docs for some methods of Uize.Widget.V2.
Indentation fix.