Merge branch 'develop' into asyncio-dev

# Conflicts:
#	pyrogram/session/session.py

pyrogram/session/session.py

@@ -239,7 +239,7 @@ class Session:
                     else [data]
                 )
 
-                log.debug(data)
+                log.debug("Received:\n{}".format(data))
 
                 for msg in messages:
                     if msg.seq_no % 2 != 0:
@@ -366,6 +366,8 @@ class Session:
         if wait_response:
             self.results[msg_id] = Result()
 
+        log.debug("Sent:\n{}".format(message))
+
         payload = MTProto.pack(
             message,
             self.current_salt.salt,