Added option to switch themes.

Added standalone pages for:
 - Exhibitions
 - Events
 - Institutions
 - Collections
Added option to limit display to only a given set of institutions.

edit/inc/functions.php

@@ -19,6 +19,14 @@ require_once __DIR__ . '/standardHTML.php';
  */
 function ensureBackendEnv() {
 
+    // Ensure secure session cookies are used.
+
+    ini_set('session.cookie_secure', '1');
+    ini_set('session.cookie_httponly', '1');
+    ini_set('session.use_only_cookies', '1');
+
+    // Ensure session is started
+
     if (session_status() != PHP_SESSION_ACTIVE) {
         session_start();
     }