various improvements

- removed gallery (didn't like it)
- added "more news" button
- reworked navigation between posts
- updated font-awesome
- some things i already forgot

_layouts/post.html

@@ -31,10 +31,10 @@
       </div>
       <p class="post-nav">
       {% if page.previous.url %}
-        <a class="post-prev" href="{{site.baseurl}}{{page.previous.url}}">&laquo; {{page.previous.title}}</a>
+        <a class="post-prev" href="{{site.baseurl}}{{page.previous.url}}">{{page.previous.title}} <i class="fa fa-arrow-right" aria-hidden="true"></i></a>
       {% endif %}
       {% if page.next.url %}
-        <a class="post-next" href="{{site.baseurl}}{{page.next.url}}">{{page.next.title}} &raquo;</a>
+        <a class="post-next" href="{{site.baseurl}}{{page.next.url}}"><i class="fa fa-arrow-left" aria-hidden="true"></i> {{page.next.title}}</a>
       {% endif %}
       </p>
     </div>