- add ResumptionToken for OAI-ListIdentifiers

- max identifiers and reciords via config
- add constants.php
- add clear-expired command for deleting obsolete cache

composer.json

@@ -9,6 +9,7 @@
 	"type": "project",
 	"require": {
 		"php": "^7.1.3",
+		"arifhp86/laravel-clear-expired-cache-file": "^0.0.4",
 		"astrotomic/laravel-translatable": "^11.1",
 		"davejamesmiller/laravel-breadcrumbs": "5.x",
 		"felixkiss/uniquewith-validator": "^3.1",
@@ -27,7 +28,8 @@
 	},
 	"autoload": {
 		"files": [
-			"app/Helpers/utils.php"
+			"app/Helpers/utils.php",
+			"app/Constants/constants.php"
 		],
 		"classmap": [
 			"database/seeds",