Resolve "Make Alsijil work with current core"

Closes #60 (closed)

aleksis/apps/alsijil/static/css/alsijil/full_register.css

@@ -130,3 +130,14 @@ table.person-info td.person-img img {
 .sheet * {
     page-break-inside: avoid;
 }
+
+img.max-size-600 {
+  max-width: 600px;
+  max-height: 600px;
+}
+
+img.center{
+  position: relative;
+  left: 50%;
+  transform: translateX(-50%);
+}