PhotoPage: show software used to edit photo

models/EXIF.php

@@ -12,6 +12,7 @@ class EXIF
 	public $iso = 0;
 	public $shutter_speed = 0;
 	public $title = '';
+	public $software = '';
 
 	private function __construct(array $meta)
 	{
@@ -35,6 +36,7 @@ class EXIF
 			'iso' => 0,
 			'shutter_speed' => 0,
 			'title' => '',
+			'software' => '',
 		];
 
 		if (!function_exists('exif_read_data'))
@@ -101,6 +103,9 @@ class EXIF
 		elseif (!empty($exif['DateTimeDigitized']))
 			$meta['created_timestamp'] = self::toUnixTime($exif['DateTimeDigitized']);
 
+		if (!empty($exif['Software']))
+			$meta['software'] = $exif['Software'];
+
 		return new self($meta);
 	}