Add portable project that contains the IHasPageTitle-interface. ViewModels may implement this to set its title in a ViewPager.
Add PCL-project to solution and reference it from Droid-project.
Override GetPageTitleFormatted to get the title of a page.
Support automatic layout lookup. If the templateId is 0, we try to get a layout based on the class name of the shown ViewModel. May be customized further.