Merge pull request 'Asset: let slugs consist only of an explicit set of allowed characters' (#41) from clean-slugs into master

Reviewed-on: Public/pics#41

controllers/EditAsset.php

@@ -63,7 +63,7 @@ class EditAsset extends HTMLController
 			{
 				$date_captured = !empty($_POST['date_captured']) ?
 					new DateTime(str_replace('T', ' ', $_POST['date_captured'])) : null;
-				$slug = strtr($_POST['slug'], [' ' => '-', '--' => '-', '&' => 'and', '=>' => '', "'" => "", ":"=> "", '\\' => '-']);
+				$slug = Asset::cleanSlug($_POST['slug']);
 				$asset->setKeyData(htmlspecialchars($_POST['title']), $slug, $date_captured, intval($_POST['priority']));
 			}