Make posts nicer

_posts/2016-10-01-KWARC-established.md

_posts/2016-10-01.md

_posts/2017-01-19-MathModels-Workshop.md

_posts/2017-03-24-WIAS.md

_posts/2017-04-26-ODK-review.md

_posts/2017-05-01-recruiting.md

_tagpages/README.md

_tagpages/blogpost.md

_tagpages/conference.md

_tagpages/publication.md

_tagpages/recruiting.md

_tagpages/release.md

_tagpages/talk.md

_tagpages/workshop.md

index.md

news/index.html

news/posts.html