Add masonry

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

assets/sass/content.scss

@@ -4,6 +4,10 @@
   padding: 2rem;
 }
 
+.content.wide {
+  max-width: $width-wide;
+}
+
 @media (max-width: $width-mobile) {
   .content {
     padding: 1rem;