BF: asyncserver now ensures all data is sent

Previously was using `send` method, which uses `socket.send`. This does
not guarantee to send all data, and no check was in place to verify
whether all data was sent. Using asynchat built in `push` method,
ensures that all data is sent before closing the connection.

server/asyncserver.py

@@ -65,7 +65,7 @@ class RequestHandler(asynchat.async_chat):
 		# Serializes the response.
 		message = dumps(message, HIGHEST_PROTOCOL)
 		# Sends the response to the client.
-		self.send(message + RequestHandler.END_STRING)
+		self.push(message + RequestHandler.END_STRING)
 		# Closes the channel.
 		self.close_when_done()