Add a few minor helpers

scss/base/_grid.scss

@@ -156,6 +156,7 @@ html{
   }
   
   .row--align-center{ align-items: center;}
+  .row--justify-center{ justify-content: center; }
   .col--align-center{ align-self: center; align-self: anchor-center}
   
   /* Sort into col/sm areas with media queries */

scss/helpers/_main_helpers.scss

@@ -2,6 +2,8 @@
 
 /* Misc helpers */
 .tar{ text-align: right; }
+.tac{ text-align: center; }
+.tal{ text-align: left; }
 
 .no-padd{ padding: 0; }