Added multi-tagging (#159)

Updated all scripts to deal with multiple tags, the only thing missing is to actually multi-tag all snippets retroactively.

docs/mini/flavor.scss

@@ -131,6 +131,8 @@ $_drawer-right: false;
 
 @import 'navigation';
 
+$mark-back-color: #424242;
+$mark-font-size: 0.5em;
 
 $toast-back-color:       #212121;
 
@@ -163,6 +165,12 @@ $_include-collapse: false;
   transition: opacity 0.3s ease-in-out;
 }
 
+mark {
+  position: relative;
+  top: -0.25rem;
+  left: 0.25rem;
+}
+
 /*
   Custom elements for contextual background elements, toasts and tooltips.
 */