Add Slack to footer

_config.yml

@@ -27,7 +27,7 @@ footer-links:
   stackoverflow: # your stackoverflow profile, e.g. "users/50476/bart-kiers"
   youtube: # channel/<your_long_string> or user/<user-name>
   googleplus: # anything in your profile username that comes after plus.google.com/
-
+  slack: t/aquaris-dev/shared_invite/enQtMzgwNzc5NTAxNjQ4LWQxM2MyMzlkZDIzY2U4MjhmZmIxYzQzNjExMGM3MzA5YzIxNDA5ODNkYTRhMWNjZmY4ODIwZTU3MTI5MTU0OGU
 
 # Enter your Disqus shortname (not your username) to enable commenting on posts
 # You can find your shortname on the Settings page of your Disqus account

_includes/svg-icons.html

@@ -10,4 +10,6 @@
 {% if site.footer-links.twitter %}<a href="https://www.twitter.com/{{ site.footer-links.twitter }}"><i class="svg-icon twitter"></i></a>{% endif %}
 {% if site.footer-links.stackoverflow %}<a href="http://stackoverflow.com/{{ site.footer-links.stackoverflow }}"><i class="svg-icon stackoverflow"></i></a>{% endif %}
 {% if site.footer-links.youtube %}<a href="https://youtube.com/{{ site.footer-links.youtube }}"><i class="svg-icon youtube"></i></a>{% endif %}
-{% if site.footer-links.googleplus %}<a href="https://plus.google.com/{{ site.footer-links.googleplus }}"><i class="svg-icon googleplus"></i></a>{% endif %}
+{% if site.footer-links.googleplus %}<a href="https://plus.google.com/{{ site.footer-links.googleplus }}"><i class="svg-icon googleplus"></i></a>{% endif %}
+{% if site.footer-links.slack %}<a href="https://join.slack.com/{{ site.footer-links.slack }}"><i class="svg-icon slack"></i></a>{% endif %}
+