refactor styles and structure for wompum components; improve grid spacing and layout

layouts/partials/article-wompum.html

@@ -1,7 +1,5 @@
-<div class="wompum-container">
-  <div class="wompum-article-grid"
-       data-metadata="{{ dict "narrator" .Params.narrator "subject" .Params.subject "facilitator" .Params.facilitator | jsonify }}"
-       data-columns="7"
-       data-rows="5">
-  </div>
+<div class="wompum-article-grid"
+     data-metadata="{{ dict "narrator" .Params.narrator "subject" .Params.subject "facilitator" .Params.facilitator | jsonify }}"
+     data-columns="7"
+     data-rows="5">
 </div>