Center the list of projects.

Author: jdblischak

layouts/projects/summary.html

@@ -1,6 +1,6 @@
 <article>
-  <div class="columns">
-    <div class="column">
+  <div class="columns is-centered">
+    <div class="column is-one-third">
       <h3 class="title is-3"><a href="{{ .RelPermalink }}">{{ .Title }}</a></h3>
       <h5 class="subtitle is-5">{{ .Params.account }}</h5>
       <p class="content">{{ .Description | markdownify }}</p>
@@ -16,7 +16,7 @@ <h5 class="subtitle is-5">{{ .Params.account }}</h5>
       </div>
       {{ end }}
     </div>
-    <div class="column is-one-quarter">
+    <div class="column is-two-fifths">
       <figure class="thumbnail">
         <p class="image">
           <img src="{{ .RelPermalink }}thumbnail.png"