Added script to reverse list of images in a gallery

reverse.py

@@ -0,0 +1,27 @@
+#!/usr/bin/python
+
+import argparse
+import json
+import os
+import shutil
+import xml.etree.ElementTree as ET
+
+parser = argparse.ArgumentParser(description='Reverses the list of images')
+parser.add_argument('source', metavar='source', help='gallery')
+
+args = parser.parse_args()
+
+if not os.path.isdir(args.source) or not os.path.isfile(os.path.join(args.source, 'info.json')):
+    print "Error: can't find source '%s'" % (args.source)
+    exit(1)
+
+print "Inversing list..."
+with open(os.path.join(args.source, 'info.json'), 'r') as destination_data:
+    destination = json.load(destination_data)
+
+    destination['list'].pop(0)
+    destination['list'] = destination['list'][::-1]
+    destination['list'].insert(0, {})
+
+with open(os.path.join(args.source, 'info.json'), 'w') as destination_data:
+    destination_data.write(json.dumps(destination, sort_keys=True, indent=4, separators=(',', ': ')))