integrate europarl templates, add carousel block, finish function base elections page

...e2/includes/organisms/header/europarl/article_header.html

...2/includes/organisms/header/europarl/articles_header.html

.../includes/organisms/header/europarl/candidate_header.html

...includes/organisms/header/europarl/candidates_header.html

...guide2/includes/organisms/header/europarl/faq_header.html

...de2/includes/organisms/header/europarl/simple_header.html

...es/organisms/header/europarl/simple_header_with_tags.html

...ader/europarl/simple_header_with_tags_and_navigation.html

...ganisms/header/europarl/simple_header_with_ui_switch.html

...tyleguide2/includes/organisms/layout/europarl/navbar.html

...tyleguide2/includes/organisms/layout/europarl/navbar.yaml

...mplates/styleguide2/includes/organisms/layout/navbar.html