ISIS-956: updates to CssClassFaFacetOnMemberFactory and to example apps (plus other minor tidy up in ServicesInstallerFromConfiguration which was used as basis/reference of implementation of parsing strings from config file.)
ISIS-956: recreating simpleapp archetype
ISIS-956: recreating todoapp archetype
ISIS-537: minor fixes for menus.

1. scrollable menu if long
2. adding "top-menu-xxx" class to each top menu to allow application.css to apply targetted fixes if required (eg <ul class="pull-right" ...> if require right-align)
3. use Isis' CssClassAppender rather than Wicket's CssClassNameAppender (consistency in codebase)
4. removing unused code from PageAbstract