Redo all our callouts with the custom callout plugin

- Replaces manual use of .bd-callout with {% callout [type] %}
- Rearranged some callouts for proximity to others
- Turned long lists of callouts--like those on tooltips, plugings, etc--into a list because holy shit that's overwhelming

docs/javascript/tabs.md

@@ -42,10 +42,11 @@ Add quick, dynamic tab functionality to transition through panes of local conten
   </div>
 </div>
 
-<div class="bd-callout bd-callout-info">
-  <h4>Extends tabbed navigation</h4>
-  <p>This plugin extends the <a href="../components/#nav-tabs">tabbed navigation component</a> to add tabbable areas.</p>
-</div>
+{% callout info %}
+#### Extends tabbed navigation
+
+This plugin extends the [tabbed navigation component](../components/#nav-tabs) to add tabbable areas.
+{% endcallout %}
 
 ## Usage