Updated Plain_Migration to load custom migration file if it is found

It will then figure the latest migration to use

Author: phpfunk

application/libraries/Plain_Migration.php

@@ -4,6 +4,16 @@ class Plain_Migration extends CI_Migration
 {
     public function __construct($config = array())
     {
+        $main_config = $config;
+        unset($config);
+        if (file_exists(CUSTOMPATH . 'config/migration.php')) {
+            include CUSTOMPATH . 'config/migration.php';
+            $custom_config = $config;
+            unset($config);
+            $config = $main_config;
+        }
+
+        $config['migration_version'] = (isset($custom_config['migration_version']) && $custom_config['migration_version'] > $config['migration_version']) ? $custom_config['migration_version'] : $config['migration_version'];
         parent::__construct($config);
         self::checkForInnoDB();
     }

system/core/Common.php

@@ -514,16 +514,16 @@ function _exception_handler($severity, $message, $filepath, $line)
 	function remove_invisible_characters($str, $url_encoded = TRUE)
 	{
 		$non_displayables = array();
-		
+
 		// every control character except newline (dec 10)
 		// carriage return (dec 13), and horizontal tab (dec 09)
-		
+
 		if ($url_encoded)
 		{
 			$non_displayables[] = '/%0[0-8bcef]/';	// url encoded 00-08, 11, 12, 14, 15
 			$non_displayables[] = '/%1[0-9a-f]/';	// url encoded 16-31
 		}
-		
+
 		$non_displayables[] = '/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S';	// 00-08, 11, 12, 14-31, 127
 
 		do