Add github svg badge from https://github.com/logos

Author: jasongrout

_includes/biocard.html

@@ -16,7 +16,7 @@
         <a href="{{ include.personal }}" rel="noopener noreferrer">Web</a>
       {% endif %}
       {% if include.gh_handle %}
-        <a href="https://github.com/{{ include.gh_handle }}" rel="noopener noreferrer">GitHub</a>
+        <a href="https://github.com/{{ include.gh_handle }}" rel="noopener noreferrer"><img src="/assets/badges/github.svg" alt="GitHub"></a>
       {% endif %}
       {% if include.linkedin %}
         <a href="{{ include.linkedin }}" rel="noopener noreferrer">LinkedIn</a>

_sass/components/_biocard.scss

@@ -40,5 +40,9 @@
         margin-top: 0.5em;
         text-align: left;
         font-size: 14px;
+
+        img {
+            height: 24px;
+        }
     }
 }