Added some new sites and introduced 'source' feature

maigret/sites.py

@@ -69,6 +69,7 @@ class MaigretSite:
         self.engine_obj = None
         self.request_future = None
         self.alexa_rank = None
+        self.source = None
 
         for k, v in information.items():
             self.__dict__[CaseConverter.camel_to_snake(k)] = v
@@ -99,6 +100,12 @@ class MaigretSite:
 
         return None
 
+    @property
+    def pretty_name(self):
+        if self.source:
+            return f'{self.name} [{self.source}]'
+        return self.name
+
     @property
     def json(self):
         result = {}