FACES-1894

Add general utilities for Liferay Faces Alloy Components (Changed ComponentUtil.concatAllCssClasses() to ComponentUtil.concatCssClasses(). Modified ComponentsUtil.concatCssClasses() and RendererUtil.encodeStyleable() to utilize the ellipses operator instead of overloading the methods. Utilized refactored concateCssClasses() method in component getStyleClass() methods. Added "implements Styleable" to components which were missing it. Added StyleableIherited abstract component in components-ext.xml to allow reuse of style and styleClass attributes without generating java.)