[sync] skip_unchanged setting

utils/Sync/settings.py

@@ -22,6 +22,8 @@ def env(param, default=None):
 
 database_uri = env('MONGO_URI')
 
+skip_unchanged = False
+
 person_uri = {
     'Н.В.Андреева': 'nv-andreeva',
     'И.Н.Втюрина': 'in-vturina',

utils/Sync/sync/__init__.py

@@ -44,6 +44,8 @@ folder_name_pattern = re.compile('([\d.]+)(.*)')
 
 
 def untouched(documents, store):
+    if settings.skip_unchanged:
+        return documents
     return lmap(
         lambda i: i[0],
         filter(