[Implementation] Added a newMethod flag to support v6.45.1

[BernaLang]

In the version 6.43 the api auth method was changed but it was only on version 6.45.1 released on 01/07/19 that it was made obligatory. This pull request adds a flag on the login function to be able to do login on the new version.

This implementation is not the best because i couldn't fully understand how the connection process works and my time was short.

But i tested on both versions and it seems to work fine. I've also added info on the Readme and added a file to test the new auth method.