[sync] updated: config based; async loop; Documents adopted to new system

utils/Sync/sync/models/__init__.py

@@ -1,6 +1,25 @@
 class Model:
-    def __init__(self):
+    def __init__(self, provider, store, file):
         super().__init__()
 
+        self.provider = provider
+        self.store = store
+        self.file = file
+
+        self.id = None
+        self.url = None
+        self.hash = None
+
+        self.init()
+
+    def init(self):
+        pass
+
     def bake(self):
         return None
+
+    async def is_changed(self):
+        return False
+
+    async def save(self):
+        pass