Add LinkedIn and Instagram to footer

- Add title to the social media icons in the footer
- Update Font Awesome to 4.7
- Change YouTube icon to fit current branding

Author: raccube

_config.yml

@@ -29,10 +29,24 @@ emails:
   accounts: [email protected]
 
 social:
-  facebook-official: //facebook.com/StudentRobotics
-  twitter: //twitter.com/studentrobotics
-  youtube: //youtube.com/StudentRobotics
-  github: //github.com/srobo
+  - title: GitHub
+    icon: github
+    link: https://github.com/srobo
+  - title: Twitter
+    icon: twitter
+    link: https://twitter.com/studentrobotics
+  - title: YouTube
+    icon: youtube-play
+    link: https://youtube.com/user/StudentRobotics
+  - title: Instagram
+    icon: instagram
+    link: https://www.instagram.com/student_robotics/
+  - title: Facebook
+    icon: facebook-official
+    link: https://facebook.com/StudentRobotics
+  - title: LinkedIn
+    icon: linkedin
+    link: https://www.linkedin.com/company/10969472/
 
 exclude:
   - README.md

_includes/footer.html

@@ -40,7 +40,7 @@ <h4>&nbsp;</h4>
     <div class="column d-6-12 text-right">
       <ul class="social-media-links">
         {% for account in site.social %}
-        <li><a href="{{ account[1] }}"><i class="fa fa-{{ account[0] }}" aria-hidden="true"></i></a></li>
+        <li><a href="{{ account.link }}"><i class="fa fa-{{ account.icon }}" aria-hidden="true" title="{{ account.title }}"></i></a></li>
         {% endfor %}
       </ul>
     </div>

_includes/head.html

@@ -6,7 +6,7 @@
   <title>{% if page.title %}{{ page.title }} | {% endif %}{{ site.title }}</title>
   <meta name="description" content="{% if page.excerpt %}{{ page.excerpt | strip_html | strip_newlines | truncate: 160 }}{% else %}{{ site.description }}{% endif %}">
 
-  <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css">
+  <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
   <link rel="stylesheet" href="{{ '/css/main.css' | prepend: site.baseurl }}">
 
   {% if page.extra_css %}