Datascience theme: links are now blue and underlined
Change background color of sidebars on home page
Datascience theme: don't display meta information
Wrap widgets in "widget" class

Conflicts:
	src/Core/Widgets.php
Datascience theme: bigger titles on pages, smaller titles on widgets
Datascience theme: remove different coloring in article intro

Conflicts:
	content/themes/datascience/main.css
Wrap article teaser text and links in "article_teaser_text" div
Remove extra spaces in ArticleListView

Conflicts:
	src/Page/View/ArticleListView.php
Datascience theme: don't let text flow under image in article teasers
Add with_featured_image class to articles when they have such an image

Conflicts:
	src/Page/View/ArticleListView.php
Datasciene theme: fix article teaser text width bug

The whole width can be used when there is no featured image.
Datasciene theme: larger margins for arrow links