SEAMFACES-238 : Theme handling (from Seam 2)

[gonzalad]

Showcase included in viewconfig webapp.

• initializing themes : create a startup Singleton bean, inject ThemeConfig and set availableThemes field.

• theme key / values : property files (same name as the availableThemes properties).

• to use a theme in a JSF file, just use {theme.key}

  see http://docs.jboss.org/seam/2.2.2.Final/reference/en-US/html/i18n.html#d0e14307

Sample usage

Theme initialization :

@Singleton
@Startup
public class MyAppStartupConfig {

    @Inject
    private ThemeConfig themeConfig;

    @PostConstruct
    public void onLoad() {
        themeConfig.setAvailableThemes(new String[]{"blue", "red", "black"});
    }
}

Theme usage :

#{theme.borderColor}

Theme selection :

<h:selectOneMenu value="#{themeSelector.theme}">
    <f:selectItems value="#{themeSelector.themes}"/>
</h:selectOneMenu>
<h:commandButton action="#{themeSelector.select}" id="themeSelector" value="OK"/>

[lincolnthree]

Hey, all these pull requests you submitted look pretty deep/big features. Do you have some test cases for this stuff that you could add?