Add RSS icon to social.html (alshedivat#418)

* Add rss icon

* Add a blank line to make sure rss icon is always at the last

Author: rohandebsarkar

_config.yml

@@ -66,6 +66,8 @@ wikidata_id: # your wikidata id
 dblp_url: # your DBLP profile url
 stackoverflow_id: #your stackoverflow id
 
+rss_icon: true
+
 contact_note: >
   You can even add a little note about which of these is the best way to reach you.
 

_includes/social.html

@@ -16,3 +16,5 @@
 {% if site.gitlab_username %}<a href="https://gitlab.com/{{ site.gitlab_username }}" title="GitLab"><i class="fab fa-gitlab"></i></a>{% endif %}
 {% if site.dblp_url %}<a href="{{ site.dblp_url }}" title="DBLP"><i class="ai ai-dblp"></i></a>{% endif %}
 {% if site.stackoverflow_id %}<a href="https://stackoverflow.com/users/{{ site.stackoverflow_id }}" title="Stackoverflow"><i class="fab fa-stack-overflow"></i></a>{% endif %}
+
+{% if site.rss_icon %}<a href="{{ site.baseurl | prepend: site.url }}/feed.xml" title="RSS Feed"><i class="fas fa-rss-square"></i></a>{% endif %}