Merge pull request #1 from kiangtengl/ribbon-menu-support

Styled Ribbon Button and RadioButton
Changed resources from static to dynamic for Ribbon/RibbonButton.xaml and Ribbon/RibbonRadioButton.xaml.
Changed border, border brush and border thickness bindings for Ribbon/RibbonButton.xaml and Ribbon/RibbonRadioButton.xaml.