Enable auto-population & remove author pages

Make the navbar, main article list and content of articles (images, dates and authors) populate automatically, and remove pages for each author.

_posts/2019-01-01-article-name.md

@@ -0,0 +1,18 @@
+---
+title: Title1
+description: An article description1
+layout: article
+categories: articles
+date: 2019-01-01 7:01
+authors: Name
+---
+
+<h3 class="mdc-typography--subtitle1">
+    <time class="timeago" datetime="{{ page.date | date: '%Y-%m-%d' }}T{{ page.date | date: '%H:%M:%S' }}">{{ page.date | date: '%A %e %B %Y' }}</time>
+     | by {{ page.authors }}
+</h3>
+<figure>
+    <img src="/images/article_name--cover.jpg" style="width:100%;">
+    <figcaption class="mdc-typography--caption-text">A brass statue of a child, in a garden</figcaption>
+</figure>
+Content