feat(meta header): add meta header author to header if exists in config.yml

_config.yml

@@ -4,6 +4,7 @@ email: your-email@domain.com
 url: https://example.github.io
 description: "Write an awesome description for your new site here. You can edit this line in _config.yml. It will appear in your document head meta (for Google search results) and in your feed.xml site description."
 skills: "Web Developer - Graphic Artist - User Experience Designer"
+meta_author: LastName FirstName
 
 # Contact form: comment the line below if you want to stick with the default PHP contact form
 contact: static

_includes/head.html

@@ -4,6 +4,7 @@
     <title>{% if page.title %}{{ page.title }}{% else %}{{ site.title }}{% endif %}</title>
     <meta name="viewport" content="width=device-width">
     <meta name="description" content="{{ site.description }}">
+    {% if site.meta_author %}<meta name="author" content="{{ site.meta_author }}">{% endif %}
     <link rel="canonical" href="{{ page.url | replace:'index.html','' | prepend: site.url }}">
     <link rel="alternate" type="application/rss+xml" title="RSS" href="/feed.xml">