fixed missing css for centering images

_sass/_base.scss

@@ -112,6 +112,22 @@ figure > figcaption {
     border-top: 2px solid $color-uw-blue;
 }
 
+.center {
+    >div>img {
+        display:block;
+    	margin:auto;
+    }
+    >div>figure>img {
+        display:block;
+    	margin:auto;
+    }   
+    >div>figure>figcaption {
+        display:block;
+    	margin:auto;
+    }  
+}
+
+
 .image {
     position: relative;