Add timeout for upload file function to fix large file send error

* Link message revoke function to itchat
* Add message revoke function
* Update core.py

to avoid:

1. get 1101 error frequently
2. won't logout even if network broken

Changing auto_login's statusStorageDir, then
KeyboardInterrupt will dump status to default file path, not new path.

https://github.com/littlecodersh/ItChat/issues/258