Add some safe functions and minor cleanup

lib/Library.php

@@ -2,6 +2,7 @@
 use function Safe\apcu_fetch;
 use function Safe\natsort;
 use function Safe\preg_replace;
+use function Safe\sleep;
 use function Safe\usort;
 
 class Library{

lib/OrmBase.php

@@ -1,4 +1,5 @@
 <?
+use Safe\DateTime;
 use function Safe\substr;
 
 abstract class OrmBase{

lib/PropertiesBase.php

@@ -1,4 +1,5 @@
 <?
+use function Safe\substr;
 
 abstract class PropertiesBase extends OrmBase{
 	public function __get($var){

lib/Template.php

@@ -1,5 +1,4 @@
 <?
-use function Safe\file_get_contents;
 use function Safe\ob_end_clean;
 
 class Template{