Merge pull request creativecommons#430 from creativecommons/update_blog

remove divider from last row of blog page.

Author: Dhruvi16

webpack/sass/main.scss

@@ -206,6 +206,12 @@ code {
   .column {
     border-bottom: 0.1875rem solid $color-light-gray;
   }
+  /* last row, irrespective of the number of elements */
+  .column:nth-last-child(-n + 3):nth-child(3n + 1), /* first element of the last row */
+  .column:nth-last-child(-n + 3):nth-child(3n + 1) ~ .column /* all its following elements */
+  {
+    border-bottom: none;
+  }
 
   .blog-entry {
     @extend .padding-vertical-larger;